Bump coverage[toml] from 7.6.8 to 7.6.9

Bumps [coverage[toml]](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[toml]
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

setup.py

@@ -103,7 +103,7 @@ def package_files(prefix: str, directory: str, extension: str):
     # Should manually update dependency versions occassionally.
     'custom_inherit==2.4.1',
     'junitparser==3.1.2',
-    'coverage[toml]==7.6.8',
+    'coverage[toml]==7.6.9',
     'fasteners==0.18',  # object store tests require fasteners
     'pytest==7.4.4',
     'ipython==8.11.0',