build(deps): bump redis from 4.4.2 to 4.5.1 in /events (#1547)

Bumps [redis](https://github.com/redis/redis-py) from 4.4.2 to 4.5.1.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](https://github.com/redis/redis-py/compare/v4.4.2...v4.5.1)

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

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

events/requirements.txt

@@ -7,4 +7,4 @@ libmozevent==1.1.23
 python-hglib==2.6.2
 pytoml==0.1.21
 pyyaml==6.0
-redis==4.4.2
+redis==4.5.1