Rename secret names in publish_docker_image.yml

.github/workflows/publish_docker_image.yml

@@ -15,8 +15,8 @@ jobs:
       - name: Log in to Docker Hub
         uses: docker/login-action@v1
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
       
       - name: Extract metadata (tags, labels) for Docker
         id: meta