Bump pytest-cov from 5.0.0 to 6.0.0 in /server (#268)

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

server/requirements.txt

@@ -46,7 +46,7 @@ flake8==7.1.1
 pytest==8.3.3
 pytest-django==4.9.0
 pytest-asyncio==0.24.0
-pytest-cov==5.0.0
+pytest-cov==6.0.0
 pytest-rerunfailures==14.0
 aioresponses==0.7.6
 yappi==1.6.0