[DEPENDABOT] Update: Bump djangorestframework from 3.15.2 to 3.16.0

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.15.2 to 3.16.0.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](https://github.com/encode/django-rest-framework/compare/3.15.2...3.16.0)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 # Django and REST framework
 Django==5.1.6
-djangorestframework==3.15.2
+djangorestframework==3.16.0
 django-cors-headers==4.7.0
 
 # Authentication
@@ -12,7 +12,7 @@ pyjwt==2.10.1
 # Database
 psycopg2-binary==2.9.10
 dj-database-url==2.3.0
-django-pghistory==3.6.0  # For model history tracking
+django-pghistory==3.5.2  # For model history tracking
 
 # Email
 requests==2.32.3  # For ForwardEmail.net API