Bump coverage from 7.11.3 to 7.12.0 in /requirements

Bumps [coverage](https://github.com/coveragepy/coveragepy) from 7.11.3 to 7.12.0.
- [Release notes](https://github.com/coveragepy/coveragepy/releases)
- [Changelog](https://github.com/coveragepy/coveragepy/blob/main/CHANGES.rst)
- [Commits](coveragepy/coveragepy@7.11.3...7.12.0)

---
updated-dependencies:
- dependency-name: coverage
  dependency-version: 7.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/tests.txt

@@ -1,4 +1,4 @@
 -r dev.txt
-coverage==7.11.3
+coverage==7.12.0
 requests-mock==1.12.1
 tblib>=3.0.0