Bump coverage from 7.0.5 to 7.2.3 in /requirements (#1183)

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.0.5 to 7.2.3.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.0.5...7.2.3)

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

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

requirements/tests.txt

@@ -2,7 +2,7 @@ Jinja2==3.1.2
 beautifulsoup4==4.12.2
 brotli==1.0.9
 calmjs==3.4.2
-coverage==7.0.5
+coverage==7.2.3
 csscompressor==0.9.5
 django-sekizai==4.0.0
 flake8==6.0.0