build(deps): update django-filter requirement

Updates the requirements on [django-filter](https://github.com/carltongibson/django-filter) to permit the latest version.
- [Release notes](https://github.com/carltongibson/django-filter/releases)
- [Changelog](https://github.com/carltongibson/django-filter/blob/main/CHANGES.rst)
- [Commits](carltongibson/django-filter@2.2.0...25.1)

---
updated-dependencies:
- dependency-name: django-filter
  dependency-type: direct:production
...

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

requirements.txt

@@ -122,7 +122,7 @@ django-permissionedforms>=0.1,<1.0
 django-taggit>=2.0,<7.0
 django-treebeard>=4.5.1,<5.0
 djangorestframework>=3.11.1,<4.0
-django-filter>=2.2,<25
+django-filter>=2.2,<26
 draftjs_exporter>=2.1.5,<3.0
 Pillow>=4.0.0,<12.0.0
 html5lib>=0.999,<2