Bump django-tenants from 3.1.0 to 3.2.0

Bumps [django-tenants](https://github.com/django-tenants/django-tenants) from 3.1.0 to 3.2.0.
- [Release notes](https://github.com/django-tenants/django-tenants/releases)
- [Changelog](https://github.com/django-tenants/django-tenants/blob/master/CHANGES.rst)
- [Commits](django-tenants/django-tenants@v3.1.0...v3.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -1 +1 @@
-django-tenants==3.1.0
+django-tenants==3.2.0