chore(deps-dev): bump pytest-cov in /requirements in the pytest group

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


Updates `pytest-cov` from 5.0.0 to 6.0.0
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: pytest
...

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

requirements/dev.txt

@@ -2,7 +2,7 @@
 
 coverage==7.6.4; python_version>="3.9"
 coverage==7.6.1; python_version<"3.9"
-pytest-cov==5.0.0
+pytest-cov==6.0.0
 
 
 # type checking and related stubs