Bump coverage from 7.6.3 to 7.6.4 in /.github

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.6.3 to 7.6.4.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.3...7.6.4)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/pythonchecks.txt

@@ -19,6 +19,6 @@ mypy==1.12.0
 types-requests==2.32.0.20241016
 pytest-xdist==3.6.1
 flake8-noqa==1.4.0
-coverage==7.6.3
+coverage==7.6.4
 setuptools==75.2.0; python_version == '3.12'
 build==1.2.2.post1