Bump cachetools from 5.0.0 to 5.1.0 (#554)

Bumps [cachetools](https://github.com/tkem/cachetools) from 5.0.0 to 5.1.0.
- [Release notes](https://github.com/tkem/cachetools/releases)
- [Changelog](https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst)
- [Commits](tkem/cachetools@v5.0.0...v5.1.0)

---
updated-dependencies:
- dependency-name: cachetools
  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

@@ -2,7 +2,7 @@
 git+https://github.com/python/cherry-picker.git@main#egg=cherry_picker
 aiohttp==3.8.1
 gidgethub==5.1.0
-cachetools==5.0.0
+cachetools==5.1.0
 redis==4.1.3
 celery==5.2.6
 sentry-sdk==1.5.12