build(deps): update check-jsonschema requirement in /requirements

Updates the requirements on [check-jsonschema](https://github.com/python-jsonschema/check-jsonschema) to permit the latest version.
- [Release notes](https://github.com/python-jsonschema/check-jsonschema/releases)
- [Changelog](https://github.com/python-jsonschema/check-jsonschema/blob/main/CHANGELOG.rst)
- [Commits](python-jsonschema/check-jsonschema@0.28.0...0.29.0)

---
updated-dependencies:
- dependency-name: check-jsonschema
  dependency-type: direct:production
...

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

requirements/gha-schema.txt

@@ -1 +1 @@
-check-jsonschema ==0.28.*
+check-jsonschema ==0.29.*