Bump django-environ from 0.9.0 to 0.11.2

Bumps [django-environ](https://github.com/joke2k/django-environ) from 0.9.0 to 0.11.2.
- [Release notes](https://github.com/joke2k/django-environ/releases)
- [Changelog](https://github.com/joke2k/django-environ/blob/main/CHANGELOG.rst)
- [Commits](joke2k/django-environ@v0.9.0...v0.11.2)

---
updated-dependencies:
- dependency-name: django-environ
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -7,7 +7,7 @@ django-allauth==0.54.0
 django-bootstrap-form==3.4
 django-contrib-comments==2.2.0
 django-csp==3.7
-django-environ==0.9.0
+django-environ==0.11.2
 django-field-history==0.8.0
 django-invitations==2.0.0
 django-notifications-hq==1.7.0