Bump celery from 5.3.6 to 5.4.0 in /requirements

Bumps [celery](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
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements/prod.txt

@@ -416,9 +416,9 @@ bitarray == 2.9.2 \
 bleach==6.0.0 \
     --hash=sha256:1a1a85c1595e07d8db14c5f09f09e6433502c51c595970edc090551f0db99414 \
     --hash=sha256:33c16e3353dbd13028ab4799a0f89a83f113405c766e9c122df8a06f5b85b3f4
-celery==5.3.6 \
-    --hash=sha256:870cc71d737c0200c397290d730344cc991d13a057534353d124c9380267aab9 \
-    --hash=sha256:9da4ea0118d232ce97dff5ed4974587fb1c0ff5c10042eb15278487cdd27d1af
+celery==5.4.0 \
+    --hash=sha256:369631eb580cf8c51a82721ec538684994f8277637edde2dfc0dacd73ed97f64 \
+    --hash=sha256:504a19140e8d3029d5acad88330c541d4c3f64c789d85f94756762d8bca7e706
 # charset-normalizer is required by requests
 charset-normalizer==3.3.2 \
     --hash=sha256:06435b539f889b1f6f4ac1758871aae42dc3a8c0e24ac9e60c2384973ad73027 \