Bump django-model-utils from 4.3.1 to 4.4.0

Bumps [django-model-utils](https://github.com/jazzband/django-model-utils) from 4.3.1 to 4.4.0.
- [Release notes](https://github.com/jazzband/django-model-utils/releases)
- [Changelog](https://github.com/jazzband/django-model-utils/blob/master/CHANGES.rst)
- [Commits](jazzband/django-model-utils@4.3.1...4.4.0)

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

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

requirements/base.txt

@@ -1,7 +1,7 @@
 # Django
 django==3.2.24
 django-environ==0.11.2
-django-model-utils==4.3.1
+django-model-utils==4.4.0
 django-anymail[mailgun]==9.2
 django-mail-templated==2.6.5
 django-allauth==0.55.2