Bump cachetools from 4.0.0 to 4.1.0 (#327)

Bumps [cachetools](https://github.com/tkem/cachetools) from 4.0.0 to 4.1.0.
- [Release notes](https://github.com/tkem/cachetools/releases)
- [Changelog](https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst)
- [Commits](tkem/cachetools@v4.0.0...v4.1.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

requirements.txt

@@ -1,7 +1,7 @@
 cherry_picker==1.3.2
 aiohttp==3.6.2
 gidgethub==4.0.0
-cachetools==4.0.0
+cachetools==4.1.0
 redis==3.4.1
 celery==4.4.2
 sentry-sdk==0.14.4