Fix another path problem

Author: mandli

.github/workflows/testing.yml

@@ -124,7 +124,7 @@ jobs:
 
     - name: Test with pytest
       run: |
-        cd ${{ env.CLAW }}
+        cd ${{ env.CLAW }}/pyclaw
         coverage run --source=src -m pytest -vv --showlocals --ignore=development -k "not test_shallow_sphere" --junitxml=test-report.xml
 
     - name: Process test results