chore: added links to the relevant aws cdk workshop tutorials in samp…

…le-app readme for the various languages (aws#16042)

When getting started with the AWS CDK, it is useful to have links to a good tutorial to help learn the tool.
This pr adds links to the generated README.md files in order to access the CDK Workshops.
This is a trivial addition but may help folks who are unaware that the CDK Workshops exist

packages/aws-cdk/lib/init-templates/v1/sample-app/csharp/README.template.md

@@ -7,6 +7,9 @@ The `cdk.json` file tells the CDK Toolkit how to execute your app.
 
 It uses the [.NET Core CLI](https://docs.microsoft.com/dotnet/articles/core/) to compile and execute your project.
 
+## Tutorial  
+See [this useful workshop](https://cdkworkshop.com/40-dotnet.html) on working with the AWS CDK for C# projects.
+
 ## Useful commands
 
 * `dotnet build src` compile this app

packages/aws-cdk/lib/init-templates/v1/sample-app/java/README.template.md

@@ -7,6 +7,10 @@ The `cdk.json` file tells the CDK Toolkit how to execute your app.
 
 It is a [Maven](https://maven.apache.org/) based project, so you can open this project with any Maven compatible Java IDE to build and run tests.
 
+## Tutorial  
+See [this useful workshop](https://cdkworkshop.com/50-java.html) on working with the AWS CDK for Java projects.
+
+
 ## Useful commands
 
  * `mvn package`     compile and run tests

packages/aws-cdk/lib/init-templates/v1/sample-app/javascript/README.template.md

@@ -5,6 +5,9 @@ which contains an Amazon SQS queue that is subscribed to an Amazon SNS topic.
 
 The `cdk.json` file tells the CDK Toolkit how to execute your app. The build step is not required when using JavaScript.
 
+## Tutorial  
+See [this useful workshop](https://cdkworkshop.com/20-typescript.html) on working with the AWS CDK for Typescript projects.
+
 ## Useful commands
 
  * `npm run test`         perform the jest unit tests

packages/aws-cdk/lib/init-templates/v1/sample-app/python/README.template.md

@@ -54,6 +54,9 @@ To add additional dependencies, for example other CDK libraries, just add to
 your requirements.txt file and rerun the `pip install -r requirements.txt`
 command.
 
+## Tutorial  
+See [this useful workshop](https://cdkworkshop.com/30-python.html) on working with the AWS CDK for Python projects.
+
 ## Useful commands
 
  * `cdk ls`          list all stacks in the app

packages/aws-cdk/lib/init-templates/v1/sample-app/typescript/README.template.md

@@ -5,6 +5,10 @@ which contains an Amazon SQS queue that is subscribed to an Amazon SNS topic.
 
 The `cdk.json` file tells the CDK Toolkit how to execute your app.
 
+## Tutorial  
+See [this useful workshop](https://cdkworkshop.com/20-typescript.html) on working with the AWS CDK for Typescript projects.
+
+
 ## Useful commands
 
  * `npm run build`   compile typescript to js