build(deps): bump pyyaml from 5.4.1 to 6.0 in /bot

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 5.4.1 to 6.0.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](yaml/pyyaml@5.4.1...6.0)

---
updated-dependencies:
- dependency-name: pyyaml
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

bot/requirements.txt

@@ -2,7 +2,7 @@
 google-cloud-storage==1.42.1
 libmozdata==0.1.73
 pytoml==0.1.21
-pyyaml==5.4.1
+pyyaml==6.0
 tenacity==8.0.1
 tqdm==4.62.3
 zstandard==0.15.2