Bump check-manifest from 0.50 to 0.51

Bumps [check-manifest](https://github.com/mgedmin/check-manifest) from 0.50 to 0.51.
- [Changelog](https://github.com/mgedmin/check-manifest/blob/master/CHANGES.rst)
- [Commits](mgedmin/check-manifest@0.50...0.51)

---
updated-dependencies:
- dependency-name: check-manifest
  dependency-version: '0.51'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -38,7 +38,7 @@ dependencies = [
 ]
 optional-dependencies.dev = [
     "actionlint-py==1.7.8.24",
-    "check-manifest==0.50",
+    "check-manifest==0.51",
     "deptry==0.23.1",
     "doc8==2.0.0",
     "doccmd==2025.9.19",