Merge pull request #879 from microsoftgraph/andrueastman-patch-1

docs: fixes typo in contribution guide

Author: andrueastman

CONTRIBUTING.md

@@ -56,9 +56,9 @@ For the purposes of the .Net client library, the generator runs through an openA
 
 ### When new features are added to the library
 Generation happens as part of a manual process that occurs once a significant change or set of changes has been added to the Graph. This may include:
- - A new workload comes to v1.0 of Graph (Microsoft Teams, Batching, etc.)
+ - A new workload comes to beta of Graph (Microsoft Teams, Batching, etc.)
  - There is significant addition of functionality (Delta Queries, etc.)
 
 However, this is evaluated on a case-by-case basis. If the library is missing beta Graph functionality that you wish to utilize, please [file an issue](https://github.com/microsoftgraph/msgraph-beta-sdk-dotnet/issues).
 
-As the beta API of Microsoft Graph is not meant to be used in production environments, breaking changes with respect to models and request builders are expected. Therefore, the packages of the library are always released with `-preview` suffix in the version.
+As the beta API of Microsoft Graph is not meant to be used in production environments, breaking changes with respect to models and request builders are expected. Therefore, the packages of the library are always released with `-preview` suffix in the version.