build(deps): Bump django in /testing/plugins_integration (#14252)

Bumps [django](https://github.com/django/django) from 6.0.2 to 6.0.3.
- [Commits](django/django@6.0.2...6.0.3)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 6.0.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

testing/plugins_integration/requirements.txt

@@ -1,5 +1,5 @@
 anyio[trio]==4.12.1
-django==6.0.2
+django==6.0.3
 pytest-asyncio==1.3.0
 pytest-bdd==8.1.0
 pytest-cov==7.0.0