build(deps-dev): bump pytest-cov in the pytest-dependencies group

Bumps the pytest-dependencies group with 1 update: [pytest-cov](https://github.com/pytest-dev/pytest-cov).


Updates `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:development
  update-type: version-update:semver-minor
  dependency-group: pytest-dependencies
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -2,5 +2,5 @@ betamax==0.9.0
 betamax-serializers==0.2.1
 pytest==8.4.0
 pytest-asyncio==0.26.0
-pytest-cov==6.1.1
+pytest-cov==6.2.1
 pytest-mock==3.14.1