Update django-environ requirement from <0.12,>=0.10.0 to >=0.10.0,<0.13

Updates the requirements on [django-environ](https://github.com/joke2k/django-environ) to permit the latest version.
- [Release notes](https://github.com/joke2k/django-environ/releases)
- [Changelog](https://github.com/joke2k/django-environ/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/joke2k/django-environ/commits)

---
updated-dependencies:
- dependency-name: django-environ
  dependency-type: direct:production
...

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

requirements/base.txt

@@ -8,6 +8,6 @@ drf-multitokenauth>=2.0.0,<2.2.0
 django-rest-registration>=0.8.3,<0.10
 django-rest-passwordreset>=1.1,<1.6
 drf-spectacular[sidecar]>=0.26.2,<0.28
-django-environ>=0.10.0,<0.12
+django-environ>=0.10.0,<0.13
 django-gravatar2>=1.4.4,<1.5
 sentry-sdk>=2.9.0,<2.19