update docker-build.yml

.github/workflows/docker-build.yml

@@ -19,8 +19,8 @@ jobs:
       - name: Log in to Docker Hub
         uses: docker/login-action@v2
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
 
       - name: Build and Push Docker Image
         uses: docker/build-push-action@v4