gh-actions: split out JSON schema validation

Author: mr-c

.github/workflows/ci.yml

@@ -36,6 +36,16 @@ jobs:
       - name: Validate CWL documents
         run: ./run_test.sh --self
 
+  validate_json:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.8.x'
+
       - name: Validate JSON schema document
         run: |
           pip install -r ./requirements-jsonschema-test.txt

requirements-jsonschema-test.txt

@@ -1,3 +1,4 @@
 jsonschema
 pytest
 requests
+typing_extensions