Use npm link instead of github for readme (Azure#12982)

This PR updates the migration guides for Key Vault to use npm link instead of github as the latter can point to previews if we were working on previews in the master branch

sdk/keyvault/keyvault-certificates/migration-guide.md

@@ -2,7 +2,7 @@
 
 This guide is intended to assist in the migration to `@azure/keyvault-certificates` from `azure-keyvault`. It will focus on side-by-side comparisons for similar operations between the two packages.
 
-Familiarity with the `azure-keyvault` package is assumed. For those new to the Key Vault client libraries for JavaScript, please refer to the [README for @azure/keyvault-certificates][kvc-readme] rather than this guide.
+Familiarity with the `azure-keyvault` package is assumed. For those new to the Key Vault client libraries for JavaScript, please refer to the [README for @azure/keyvault-certificates][kvc-npm] rather than this guide.
 
 ## Table of contents
 
@@ -73,7 +73,7 @@ async function main() {
 main().catch((err) => console.error(err));
 ```
 
-Now in `@azure/keyvault-certificates` you can create a `CertificateClient` using any credential from [`@azure/identity`][identity-readme].
+Now in `@azure/keyvault-certificates` you can create a `CertificateClient` using any credential from [`@azure/identity`][identity-npm].
 
 You can install them by simply running the following command at the root of your project:
 
@@ -212,12 +212,9 @@ await client.purgeDeletedCertificate(deletedCertificate.name);
 * [Key Vault Certificates samples for TypeScript](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/keyvault/keyvault-certificates/samples/typescript)
 * [General Key Vault samples for TypeScript](https://docs.microsoft.com/samples/browse/?products=azure-key-vault&languages=typescript)
 
-[kvk-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-keys/README.md
-[kvs-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-secrets/README.md
-[kvc-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-certificates/README.md
 [kvk-npm]: https://www.npmjs.com/package/@azure/keyvault-keys
 [kvs-npm]: https://www.npmjs.com/package/@azure/keyvault-secrets
 [kvc-npm]: https://www.npmjs.com/package/@azure/keyvault-certificates
 [ts-guidelines]: https://azure.github.io/azure-sdk/typescript_introduction.html
-[identity-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/identity/identity/README.md
+[identity-npm]: https://www.npmjs.com/package/@azure/identity
 [identity-readme-DAC]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/identity/identity/README.md#defaultazurecredential

sdk/keyvault/keyvault-keys/migration-guide.md

@@ -2,7 +2,7 @@
 
 This guide is intended to assist in the migration to `@azure/keyvault-keys` from `azure-keyvault`. It will focus on side-by-side comparisons for similar operations between the two packages.
 
-Familiarity with the `azure-keyvault` package is assumed. For those new to the Key Vault client libraries for JavaScript, please refer to the [README for @azure/keyvault-keys][kvk-readme] rather than this guide.
+Familiarity with the `azure-keyvault` package is assumed. For those new to the Key Vault client libraries for JavaScript, please refer to the [README for @azure/keyvault-keys][kvk-npm] rather than this guide.
 
 ## Table of contents
 
@@ -75,7 +75,7 @@ async function main() {
 main().catch((err) => console.error(err));
 ```
 
-Now in `@azure/keyvault-keys` you can create a `KeyClient` using any credential from [`@azure/identity`][identity-readme].
+Now in `@azure/keyvault-keys` you can create a `KeyClient` using any credential from [`@azure/identity`][identity-npm].
 
 You can install them by simply running the following command at the root of your project:
 
@@ -250,12 +250,9 @@ console.log(operationResult.result);
 * [Key Vault keys samples for TypeScript](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/keyvault/keyvault-keys/samples/typescript)
 * [General Key Vault samples for TypeScript](https://docs.microsoft.com/samples/browse/?products=azure-key-vault&languages=typescript)
 
-[kvk-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-keys/README.md
-[kvs-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-secrets/README.md
-[kvc-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-certificates/README.md
 [kvk-npm]: https://www.npmjs.com/package/@azure/keyvault-keys
 [kvs-npm]: https://www.npmjs.com/package/@azure/keyvault-secrets
 [kvc-npm]: https://www.npmjs.com/package/@azure/keyvault-certificates
 [ts-guidelines]: https://azure.github.io/azure-sdk/typescript_introduction.html
-[identity-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/identity/identity/README.md
+[identity-npm]: https://www.npmjs.com/package/@azure/identity
 [identity-readme-DAC]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/identity/identity/README.md#defaultazurecredential

sdk/keyvault/keyvault-secrets/migration-guide.md

@@ -2,7 +2,7 @@
 
 This guide is intended to assist in the migration to `@azure/keyvault-secrets` from `azure-keyvault`. It will focus on side-by-side comparisons for similar operations between the two packages.
 
-Familiarity with the `azure-keyvault` package is assumed. For those new to the Key Vault client libraries for JavaScript, please refer to the [README for @azure/keyvault-secrets][kvs-readme] rather than this guide.
+Familiarity with the `azure-keyvault` package is assumed. For those new to the Key Vault client libraries for JavaScript, please refer to the [README for @azure/keyvault-secrets][kvs-npm] rather than this guide.
 
 ## Table of contents
 
@@ -73,7 +73,7 @@ async function main() {
 main().catch((err) => console.error(err));
 ```
 
-Now in `@azure/keyvault-secrets` you can create a `SecretClient` using any credential from [`@azure/identity`][identity-readme].
+Now in `@azure/keyvault-secrets` you can create a `SecretClient` using any credential from [`@azure/identity`][identity-npm].
 
 You can install them by simply running the following command at the root of your project:
 
@@ -193,12 +193,9 @@ await client.purgeDeletedSecret(deletedSecret.name);
 * [Key Vault Secrets samples for TypeScript](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/keyvault/keyvault-secrets/samples/typescript)
 * [General Key Vault samples for TypeScript](https://docs.microsoft.com/samples/browse/?products=azure-key-vault&languages=typescript)
 
-[kvk-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-keys/README.md
-[kvs-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-secrets/README.md
-[kvc-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/keyvault/keyvault-certificates/README.md
 [kvk-npm]: https://www.npmjs.com/package/@azure/keyvault-keys
 [kvs-npm]: https://www.npmjs.com/package/@azure/keyvault-secrets
 [kvc-npm]: https://www.npmjs.com/package/@azure/keyvault-certificates
 [ts-guidelines]: https://azure.github.io/azure-sdk/typescript_introduction.html
-[identity-readme]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/identity/identity/README.md
+[identity-npm]: https://www.npmjs.com/package/@azure/identity
 [identity-readme-DAC]: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/identity/identity/README.md#defaultazurecredential