Bump pytest-cov from 5.0.0 to 6.0.0 in /ci/latest

Bumps [pytest-cov](https://github.com/pytest-dev/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:production
  update-type: version-update:semver-major
...

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

ci/latest/requirements.txt

@@ -8,7 +8,7 @@ httpx==0.27.2
 hypothesis==6.118.0
 nextline-test-utils==0.1.2
 pytest-asyncio==0.24.0
-pytest-cov==5.0.0
+pytest-cov==6.0.0
 pytest==8.3.3
 pytest-httpx==0.33.0
 deepdiff==8.0.1