fixed typo (#913)

* fixed typo

opens the benefits _**of**_ GraphQL for more people

* changelog updates

CHANGELOG.md

@@ -14,6 +14,7 @@
   [@hobochild](https://github.com/hobochild) in [#935](https://github.com/apollographql/apollo-link/pull/935)  <br />
   [@bkoltai](https://github.com/bkoltai) in [#925](https://github.com/apollographql/apollo-link/pull/925)  <br />
   [@NickTomlin](https://github.com/NickTomlin) in [#923](https://github.com/apollographql/apollo-link/pull/923)  <br />
+  [@thekogmo](https://github.com/thekogmo) in [#913](https://github.com/apollographql/apollo-link/pull/913)  <br />
   [@thekogmo](https://github.com/thekogmo) in [#912](https://github.com/apollographql/apollo-link/pull/912)  <br />
 
 ### apollo-link

docs/source/links/rest.md

@@ -3,7 +3,7 @@ title: apollo-link-rest
 description: Call your REST APIs inside your GraphQL queries.
 ---
 
-Calling REST APIs from a GraphQL client opens the benefits GraphQL for more people, whether:
+Calling REST APIs from a GraphQL client opens the benefits of GraphQL for more people, whether:
 
 * You are in a front-end developer team that wants to try GraphQL without asking for the backend team to implement a GraphQL server.
 * You have no access to change the backend because it's an existing set of APIs, potentially managed by a 3rd party.