Merge pull request #1744 from nationalarchives/renovate/django-5.1.x

Update dependency django to v5.1.3

requirements/base.txt

@@ -4,7 +4,7 @@ whitenoise==6.8.2  # https://github.com/evansd/whitenoise
 
 # Django
 # ------------------------------------------------------------------------------
-django==5.1.2  # https://www.djangoproject.com/
+django==5.1.3  # https://www.djangoproject.com/
 django-environ>=0.11.0  # https://github.com/joke2k/django-environ
 django-model-utils==5.0.0  # https://github.com/jazzband/django-model-utils
 django-allauth==0.63.6  # https://github.com/pennersr/django-allauth