Bump celery[redis] from 5.3.6 to 5.4.0

Bumps [celery[redis]](https://github.com/celery/celery) from 5.3.6 to 5.4.0.
- [Release notes](https://github.com/celery/celery/releases)
- [Changelog](https://github.com/celery/celery/blob/main/Changelog.rst)
- [Commits](celery/celery@v5.3.6...v5.4.0)

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

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

base-requirements.txt

@@ -19,7 +19,7 @@ feedparser==6.0.11
 beautifulsoup4==4.12.3
 icalendar==4.0.7
 chardet==4.0.0
-celery[redis]==5.3.6
+celery[redis]==5.4.0
 django-celery-beat==2.5.0
 # TODO: We may drop 'django-imagekit' completely.
 django-imagekit==5.0  # 5.0 is first version that supports Django 4.2