Bump coverage[toml] from 7.6.7 to 7.6.8

Bumps [coverage[toml]](https://github.com/nedbat/coveragepy) from 7.6.7 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@7.6.7...7.6.8)

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

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

Author: dependabot[bot]

requirements-coverage.txt

@@ -1,2 +1,2 @@
 -e .
-coverage[toml]==7.6.7
+coverage[toml]==7.6.8