build(deps): Bump pytest-django in /testing/plugins_integration (#12792)

Bumps [pytest-django](https://github.com/pytest-dev/pytest-django) from 4.8.0 to 4.9.0.
- [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@v4.8.0...v4.9.0)

---
updated-dependencies:
- dependency-name: pytest-django
  dependency-type: direct:production
  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>

testing/plugins_integration/requirements.txt

@@ -3,7 +3,7 @@ django==5.1
 pytest-asyncio==0.24.0
 pytest-bdd==7.2.0
 pytest-cov==5.0.0
-pytest-django==4.8.0
+pytest-django==4.9.0
 pytest-flakes==4.0.5
 pytest-html==4.1.1
 pytest-mock==3.14.0