Bump django-model-utils from 4.3.1 to 4.5.1

Bumps [django-model-utils](https://github.com/jazzband/django-model-utils) from 4.3.1 to 4.5.1.
- [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...4.5.1)

---
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

@@ -13,7 +13,7 @@ flower==2.0.1  # https://github.com/mher/flower
 django==4.2.5  # pyup: < 5.0  # https://www.djangoproject.com/
 django-environ==0.11.2  # https://github.com/joke2k/django-environ
 django-timezone-field==6.1.0 # https://github.com/mfogel/django-timezone-field
-django-model-utils==4.3.1  # https://github.com/jazzband/django-model-utils
+django-model-utils==4.5.1  # https://github.com/jazzband/django-model-utils
 django-allauth==0.61.1  # https://github.com/pennersr/django-allauth
 django-private-storage==3.1.1  # https://github.com/edoburu/django-private-storage
 django-filter==24.2  # https://github.com/carltongibson/django-filter