chore(deps-dev): bump pytest-django from 4.11.1 to 4.12.0 in /backend (baserow#4884)

Bumps [pytest-django](https://github.com/pytest-dev/pytest-django) from 4.11.1 to 4.12.0.
- [Release notes](https://github.com/pytest-dev/pytest-django/releases)
- [Changelog](https://github.com/pytest-dev/pytest-django/blob/main/docs/changelog.rst)
- [Commits](pytest-dev/pytest-django@v4.11.1...v4.12.0)

---
updated-dependencies:
- dependency-name: pytest-django
  dependency-version: 4.12.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -120,7 +120,7 @@ baserow = "baserow.manage:main"
 dev = [
     "ruff>=0.8.0",
     "pytest==8.4.2",
-    "pytest-django==4.11.1",
+    "pytest-django==4.12.0",
     "pytest-env==1.2.0",
     "pytest-asyncio==1.3.0",
     "pytest-ordering==0.6",