Bump gidgethub from 5.2.1 to 5.3.0 (#565)

Bumps [gidgethub](https://github.com/brettcannon/gidgethub) from 5.2.1 to 5.3.0.
- [Release notes](https://github.com/brettcannon/gidgethub/releases)
- [Changelog](https://github.com/brettcannon/gidgethub/blob/main/docs/changelog.rst)
- [Commits](gidgethub/gidgethub@v5.2.1...v5.3.0)

---
updated-dependencies:
- dependency-name: gidgethub
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -3,7 +3,7 @@ appdirs==1.4.4
 async-timeout==4.0.2
 cachetools==5.3.1
 chardet==5.1.0
-gidgethub==5.2.1
+gidgethub==5.3.0
 multidict==6.0.4
 packaging==23.1
 pyparsing==3.0.9