Bump django-contact-form from 2.1 to 5.0.1 in /requirements

Bumps [django-contact-form](https://github.com/ubernostrum/django-contact-form) from 2.1 to 5.0.1.
- [Changelog](https://github.com/ubernostrum/django-contact-form/blob/trunk/docs/changelog.rst)
- [Commits](ubernostrum/django-contact-form@2.1...5.0.1)

---
updated-dependencies:
- dependency-name: django-contact-form
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements/common.txt

@@ -1,5 +1,5 @@
 Babel==2.10.1
-django-contact-form==2.1
+django-contact-form==5.0.1
 django-countries==7.5.1
 django-hosts==5.1
 django-money==3.1