Bump django-contact-form from 5.1.0 to 5.1.1 in /requirements

Bumps [django-contact-form](https://github.com/ubernostrum/django-contact-form) from 5.1.0 to 5.1.1.
- [Changelog](https://github.com/ubernostrum/django-contact-form/blob/trunk/docs/changelog.rst)
- [Commits](ubernostrum/django-contact-form@5.1.0...5.1.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements/common.txt

@@ -1,5 +1,5 @@
 Babel==2.16.0
-django-contact-form==5.1.0
+django-contact-form==5.1.1
 django-countries==7.6.1
 django-hosts==5.1
 django-money==3.5.3