build(deps): bump django-dbbackup from 4.1.0 to 4.2.0 in /server

Bumps [django-dbbackup](https://github.com/jazzband/django-dbbackup) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/jazzband/django-dbbackup/releases)
- [Changelog](https://github.com/jazzband/django-dbbackup/blob/master/docs/changelog.rst)
- [Commits](jazzband/django-dbbackup@4.1.0...4.2.0)

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

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

server/requirements/common.txt

@@ -7,7 +7,7 @@ django-celery-results==2.5.1
 django-cleanup==8.1.0
 django-constance[database]==4.0.0
 django-crispy-forms==2.3
-django-dbbackup==4.1.0
+django-dbbackup==4.2.0
 django-ipware==7.0.1
 djangorestframework==3.15.2
 drf-chunked-upload==0.6.0