Bump doccmd from 2024.9.19.3 to 2024.9.21

Bumps [doccmd](https://github.com/adamtheturtle/doccmd) from 2024.9.19.3 to 2024.9.21.
- [Release notes](https://github.com/adamtheturtle/doccmd/releases)
- [Changelog](https://github.com/adamtheturtle/doccmd/blob/main/CHANGELOG.rst)
- [Commits](adamtheturtle/doccmd@2024.09.19.3...2024.09.21)

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

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

pyproject.toml

@@ -44,7 +44,7 @@ optional-dependencies.dev = [
     "check-manifest==0.49",
     "deptry==0.20.0",
     "doc8==1.1.2",
-    "doccmd==2024.9.19.3",
+    "doccmd==2024.9.21",
     "furo==2024.8.6",
     "interrogate==1.7.0",
     "mypy==1.11.2",