Bump django-filter from 25.1 to 26.1 (#6377)

Bumps [django-filter](https://github.com/carltongibson/django-filter) from 25.1 to 26.1.
- [Release notes](https://github.com/carltongibson/django-filter/releases)
- [Changelog](https://github.com/carltongibson/django-filter/blob/main/CHANGES.rst)
- [Commits](https://github.com/carltongibson/django-filter/compare/25.1...26.1)

---
updated-dependencies:
- dependency-name: django-filter
  dependency-version: '26.1'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -41,7 +41,7 @@ dependencies = [
   "django-bootstrap3==26.1",
   "django-compressor==4.6.0",
   "django-countries==8.2.*",
-  "django-filter==25.1",
+  "django-filter==26.1",
   "django-formset-js-improved==0.5.0.5",
   "django-formtools==2.7",
   "django-hierarkey==2.0.*,>=2.0.1",