Bump jsonschema from 4.20.0 to 4.21.1

Bumps [jsonschema](https://github.com/python-jsonschema/jsonschema) from 4.20.0 to 4.21.1.
- [Release notes](https://github.com/python-jsonschema/jsonschema/releases)
- [Changelog](https://github.com/python-jsonschema/jsonschema/blob/main/CHANGELOG.rst)
- [Commits](python-jsonschema/jsonschema@v4.20.0...v4.21.1)

---
updated-dependencies:
- dependency-name: jsonschema
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements/requirements.txt

@@ -103,7 +103,7 @@ importlib-resources==6.1.1
     # via
     #   jsonschema
     #   jsonschema-specifications
-jsonschema==4.20.0
+jsonschema==4.21.1
     # via -r requirements/requirements.in
 jsonschema-specifications==2023.12.1
     # via jsonschema