Merge pull request #1359 from nationalarchives/fix/revert-django-v5

Revert Django v5 and v5.0.1 upgrades

requirements/base.txt

@@ -4,7 +4,7 @@ whitenoise==6.6.0  # https://github.com/evansd/whitenoise
 
 # Django
 # ------------------------------------------------------------------------------
-django==5.0.1  # pyup: < 4.0  # https://www.djangoproject.com/
+django==3.2.23  # pyup: < 4.0  # https://www.djangoproject.com/
 django-environ>=0.11.0  # https://github.com/joke2k/django-environ
 django-model-utils==4.3.1  # https://github.com/jazzband/django-model-utils
 django-allauth==0.59.0  # https://github.com/pennersr/django-allauth