Explicitly clone registry repo in "pytest" CI workflow

Author: khaeru

.github/workflows/pytest.yaml

@@ -46,6 +46,9 @@ jobs:
     - name: Install the Python package and dependencies
       run: pip install --upgrade --upgrade-strategy=eager .[tests]
 
+    - name: Clone the transport-data/registry repo
+      run: tdc registry clone
+
     - name: Run test suite using pytest
       run: |
         pytest transport_data \