Merge pull request #745 from rwaal/docs/update-typo-in-readme

docs: fix typo in README

Author: andrueastman

README.md

@@ -107,7 +107,7 @@ client = GraphServiceClient(credentials=credentials, scopes=scopes)
 
 After you have a **GraphServiceClient** that is authenticated, you can begin making calls against the service. The requests against the service look like our [REST API](https://docs.microsoft.com/graph/api/overview?view=graph-rest-1.0).
 
-> **Note**: This SDK offers an asynchronous API by default. Async is a concurrency model that is far more efficient than multi-threading, and can provide significant performance benefits and enable the use of long-lived network connections such as WebSockets. We support popular python async envronments such as `asyncio`, `anyio` or `trio`.
+> **Note**: This SDK offers an asynchronous API by default. Async is a concurrency model that is far more efficient than multi-threading, and can provide significant performance benefits and enable the use of long-lived network connections such as WebSockets. We support popular python async environments such as `asyncio`, `anyio` or `trio`.
 
 The following is a complete example that shows how to fetch a user from Microsoft Graph.