use the environment variable correctly

.github/workflows/ci.yml

@@ -58,7 +58,7 @@ jobs:
       - name: Start Redis
         uses: supercharge/[email protected]
         with:
-          redis-port: ${TEST_REDIS_PORT}
+          redis-port: ${{ env.TEST_REDIS_PORT }}
 
       - name: Install package
         run: python -m pip install .[test]