build(deps): bump coverage in the test-and-lint-dependencies group (#950)

Bumps the test-and-lint-dependencies group with 1 update: [coverage](https://github.com/nedbat/coveragepy).


Updates `coverage` from 7.6.11 to 7.6.12
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.11...7.6.12)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: test-and-lint-dependencies
...

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

Author: dependabot[bot]

requirements-test.txt

@@ -1,2 +1,2 @@
 # additional test tools
-coverage==7.6.11
+coverage==7.6.12