Bump gidgethub from 4.2.0 to 5.0.1

Bumps [gidgethub](https://github.com/brettcannon/gidgethub) from 4.2.0 to 5.0.1.
- [Release notes](https://github.com/brettcannon/gidgethub/releases)
- [Changelog](https://github.com/brettcannon/gidgethub/blob/main/docs/changelog.rst)
- [Commits](gidgethub/gidgethub@v4.2.0...5.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -3,7 +3,7 @@ appdirs==1.4.4
 async-timeout==3.0.1
 cachetools==4.2.1
 chardet==4.0.0
-gidgethub==4.2.0
+gidgethub==5.0.1
 multidict==5.1.0
 packaging==20.9
 py==1.10.0