Bump coverage from 7.3.0 to 7.3.2 in /caster-back

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.3.0 to 7.3.2.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.3.0...7.3.2)

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

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

caster-back/requirements-test.txt

@@ -2,7 +2,7 @@
 
 mixer==7.2.2
 mypy==1.4.1
-coverage==7.3.0
+coverage==7.3.2
 black==23.11.0
 unittest-xml-reporting==3.2.0
 django-stubs==4.2.3