requirements(deps): bump coverage from 7.6.8 to 7.6.9

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.6.8 to 7.6.9.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.8...7.6.9)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -6,7 +6,7 @@ freezegun==1.5.1
 parameterized==0.9.0
 
 # CI dependencies (from setup.py section "extras_require['ci']")
-coverage==7.6.8
+coverage==7.6.9
 pytest==8.3.4
 
 # Combined indirect dependencies