Fix Python test script command in CI workflow

Updated the command to run Python tests within the CI workflow from 'npm test:python' to 'npm run test:python'. This ensures the correct execution of the Python test script.

.github/workflows/test-server.yml

@@ -46,4 +46,4 @@ jobs:
       run: npm test
     - name: Test Python
       working-directory: ./server
-      run: npm test:python
+      run: npm run test:python