Bump coverage from 7.2.0 to 7.2.1 in /requirements (#1136)

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.2.0 to 7.2.1.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.2.0...7.2.1)

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

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

requirements/coverage.txt

@@ -1,2 +1,2 @@
-coverage==7.2.0
+coverage==7.2.1
 toml==0.10.2