Bump celery from 5.0.4 to 5.0.5 (#424)

Bumps [celery](https://github.com/celery/celery) from 5.0.4 to 5.0.5.
- [Release notes](https://github.com/celery/celery/releases)
- [Changelog](https://github.com/celery/celery/blob/master/Changelog.rst)
- [Commits](celery/celery@v5.0.4...v5.0.5)

Signed-off-by: dependabot-preview[bot] <[email protected]>

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

Author: dependabot-preview[bot]

requirements.txt

@@ -3,5 +3,5 @@ aiohttp==3.7.3
 gidgethub==4.2.0
 cachetools==4.2.0
 redis==3.5.3
-celery==5.0.4
+celery==5.0.5
 sentry-sdk==0.19.5