Bump django-localflavor from 3.0.1 to 3.1

Bumps [django-localflavor](https://github.com/django/django-localflavor) from 3.0.1 to 3.1.
- [Release notes](https://github.com/django/django-localflavor/releases)
- [Changelog](https://github.com/django/django-localflavor/blob/master/docs/changelog.rst)
- [Commits](django/django-localflavor@3.0.1...3.1)

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

requirements/base.txt

@@ -5,7 +5,7 @@ psycopg2-binary==2.8.6
 requests==2.25.1
 django-model-utils==4.1.1
 django-markdown-deux==1.0.5
-django-localflavor==3.0.1
+django-localflavor==3.1
 django-extensions==3.1.3
 djangorestframework==3.12.4
 django-redis==4.12.1