Bump jsonschema from 4.19.0 to 4.20.0

Bumps [jsonschema](https://github.com/python-jsonschema/jsonschema) from 4.19.0 to 4.20.0.
- [Release notes](https://github.com/python-jsonschema/jsonschema/releases)
- [Changelog](https://github.com/python-jsonschema/jsonschema/blob/main/CHANGELOG.rst)
- [Commits](python-jsonschema/jsonschema@v4.19.0...v4.20.0)

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

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

requirements/dev.txt

@@ -66,6 +66,8 @@ filelock==3.12.2
     #   virtualenv
 ghp-import==2.1.0
     # via mkdocs
+greenlet==3.0.1
+    # via sqlalchemy
 gvgen==1.0
     # via -r requirements/prod.txt
 identify==2.5.26
@@ -86,7 +88,7 @@ jinja2==3.1.2
     #   -r requirements/prod.txt
     #   diff-cover
     #   mkdocs
-jsonschema==4.19.0
+jsonschema==4.20.0
     # via -r requirements/dev.in
 jsonschema-specifications==2023.7.1
     # via jsonschema