Bump django-model-utils from 4.2.0 to 4.3.1

Bumps [django-model-utils](https://github.com/jazzband/django-model-utils) from 4.2.0 to 4.3.1.
- [Release notes](https://github.com/jazzband/django-model-utils/releases)
- [Changelog](https://github.com/jazzband/django-model-utils/blob/master/CHANGES.rst)
- [Commits](https://github.com/jazzband/django-model-utils/compare/4.2.0...4.3.1)

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

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

requirements/docker.txt

@@ -4,7 +4,7 @@ django-filter==21.1
 django-floppyforms==1.9.0
 django-guardian==2.4.0
 django-htmx==1.13.0
-django-model-utils==4.2.0
+django-model-utils==4.3.1
 django-nested-admin==3.4.0
 django-tables2==2.4.1
 gunicorn==20.1.0

requirements/local.txt

@@ -7,7 +7,7 @@ django-filter==21.1
 django-floppyforms==1.9.0
 django-guardian==2.4.0
 django-htmx==1.13.0
-django-model-utils==4.2.0
+django-model-utils==4.3.1
 django-nested-admin==3.4.0
 django-tables2==2.4.1
 Faker==12.0.0