chore(deps): bump coverage from 7.6.1 to 7.6.8 (#12032)

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.6.1 to 7.6.8.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](coveragepy/coveragepy@7.6.1...7.6.8)

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

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

Author: dependabot[bot]

ci-constraints-requirements.txt

@@ -45,7 +45,7 @@ coverage==7.2.7 ; python_full_version < '3.8'
     # via pytest-cov
 coverage==7.6.1 ; python_full_version == '3.8.*'
     # via pytest-cov
-coverage==7.6.7 ; python_full_version >= '3.9'
+coverage==7.6.8 ; python_full_version >= '3.9'
     # via pytest-cov
 distlib==0.3.9
     # via virtualenv