build(deps): Bump django in /testing/plugins_integration

Bumps [django](https://github.com/django/django) from 4.2.7 to 5.0.
- [Commits](https://github.com/django/django/compare/4.2.7...5.0)

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

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

testing/plugins_integration/requirements.txt

@@ -1,5 +1,5 @@
 anyio[curio,trio]==4.1.0
-django==4.2.7
+django==5.0
 pytest-asyncio==0.23.1
 pytest-bdd==7.0.1
 pytest-cov==4.1.0