Bump coverage from 7.6.1 to 7.6.7 in /src/requirements

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.6.1 to 7.6.7.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.1...7.6.7)

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

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

src/requirements/dev.txt

@@ -2,7 +2,7 @@
 
 django-debug-toolbar==4.4.6
 factory_boy==3.3.1
-coverage==7.6.1
+coverage==7.6.7
 pre-commit==4.0.1
 hypothesis==6.112.5
 tblib==3.0.0