Update run-docker-tests.yml

Author: jmikedupont2

.github/workflows/run-docker-tests.yml

@@ -23,12 +23,13 @@ jobs:
         password: ${{ secrets.GITHUB_TOKEN }}
 
     - name: pull the image
-      run: docker pull ${DOCKER_IMAGE_URL}
+      run: docker pull ${{ env.DOCKER_IMAGE_URL }}
 
     - name: run the Docker tests
       run: docker compose up mina-local-network
       env:
-        DOCKER_IMAGE_URL: ${DOCKER_IMAGE_URL}       
+        DOCKER_IMAGE_URL: ${{ env.DOCKER_IMAGE_URL }} 
+        
 
     - name: docker cp results
       run: docker compose cp mina-local-network:/tmp/perf.data.tar.gz perf.data.tar.gz