build(deps): Bump pytest-cov in /testing/plugins_integration

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 6.1.1 to 6.2.1.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v6.1.1...v6.2.1)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-version: 6.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

testing/plugins_integration/requirements.txt

@@ -2,7 +2,7 @@ anyio[trio]==4.9.0
 django==5.2.1
 pytest-asyncio==0.26.0
 pytest-bdd==8.1.0
-pytest-cov==6.1.1
+pytest-cov==6.2.1
 pytest-django==4.11.1
 pytest-flakes==4.0.5
 pytest-html==4.1.1