Release @actions/github v.5.0.0 (#783)

* update latest octokit definitions

* update package versions

* update link in release notes

* update tsc version

RELEASES.md

@@ -1,5 +1,8 @@
 # @actions/github Releases
 
+### 5.0.0
+- [Update @actions/github to include latest octokit definitions](https://github.com/actions/toolkit/pull/783)
+
 ### 4.0.0
 - [Add execution state information to context](https://github.com/actions/toolkit/pull/499)
 - [Update Octokit Dependencies with some api breaking changes](https://github.com/actions/toolkit/pull/498)