Bump django-bootstrap4 from 23.3 to 23.4

Bumps [django-bootstrap4](https://github.com/zostera/django-bootstrap4) from 23.3 to 23.4.
- [Release notes](https://github.com/zostera/django-bootstrap4/releases)
- [Changelog](https://github.com/zostera/django-bootstrap4/blob/main/CHANGELOG.md)
- [Commits](zostera/django-bootstrap4@v23.3...v23.4)

---
updated-dependencies:
- dependency-name: django-bootstrap4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -71,7 +71,7 @@ django-statsd-mozilla==0.4.0
 contextlib2==21.6.0
 raven==6.10.0
 sentry-sdk==1.39.0
-django-bootstrap4==23.3
+django-bootstrap4==23.4
 django-bootstrap-form==3.4
 django-debug-toolbar==4.2.0
 django-smoketest==1.2.0