Bump django-filter from 23.3 to 23.4 in /src/requirements

Bumps [django-filter](https://github.com/carltongibson/django-filter) from 23.3 to 23.4.
- [Release notes](https://github.com/carltongibson/django-filter/releases)
- [Changelog](https://github.com/carltongibson/django-filter/blob/main/CHANGES.rst)
- [Commits](carltongibson/django-filter@23.3...23.4)

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

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

src/requirements/production.txt

@@ -12,7 +12,7 @@ django-bleach==3.1.0
 django-bootstrap3==23.4
 django-cors-headers==4.2.0
 django-extensions==3.2.3
-django-filter==23.3
+django-filter==23.4
 django-leaflet==0.29.0
 django-jsonview==2.0.0
 django-oauth-toolkit==2.3.0