Rename Django's dev branch to main.
Rename Django's dev branch to main.

More information: https://groups.google.com/g/django-developers/c/tctDuKUGosc/
Refs: https://github.com/django/django/pull/14048

django-debug-toolbar/django-debug-toolbar,django-debug-toolbar/django-debug-toolbar,tim-schilling/django-debug-toolbar,django-debug-toolbar/django-debug-toolbar,jazzband/django-debug-toolbar,jazzband/django-debug-toolbar,jazzband/django-debug-toolbar,tim-schilling/django-debug-toolbar,tim-schilling/django-debug-toolbar,spookylukey/django-debug-toolbar,spookylukey/django-debug-toolbar,spookylukey/django-debug-toolbar