Bump celery from 5.3.1 to 5.3.3 in /server

Bumps [celery](https://github.com/celery/celery) from 5.3.1 to 5.3.3.
- [Release notes](https://github.com/celery/celery/releases)
- [Changelog](https://github.com/celery/celery/blob/main/Changelog.rst)
- [Commits](celery/celery@v5.3.1...v5.3.3)

---
updated-dependencies:
- dependency-name: celery
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

server/requirements.txt

@@ -12,6 +12,6 @@ pytz==2023.3
 sqlparse==0.4.4
 tzdata==2023.3
 whitenoise==6.5.0
-celery==5.3.1
+celery==5.3.3
 redis==5.0.0
 drf-spectacular==0.26.4