chore(deps): bump python-gitlab from 8.3.0 to 8.4.0 (#14956)

Bumps [python-gitlab](https://github.com/python-gitlab/python-gitlab) from 8.3.0 to 8.4.0.
- [Release notes](https://github.com/python-gitlab/python-gitlab/releases)
- [Changelog](https://github.com/python-gitlab/python-gitlab/blob/main/CHANGELOG.md)
- [Commits](python-gitlab/python-gitlab@v8.3.0...v8.4.0)

---
updated-dependencies:
- dependency-name: python-gitlab
  dependency-version: 8.4.0
  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>
Co-authored-by: Cody Maffucci <46459665+Maffooch@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -43,7 +43,7 @@ vobject==0.9.9
 whitenoise==5.2.0
 titlecase==2.4.1
 gitpython==3.1.50
-python-gitlab==8.3.0
+python-gitlab==8.4.0
 cpe==1.3.1
 packageurl-python==0.17.6
 django-crum==0.7.9