fix names

Author: Robbie1977

.github/workflows/docker.yml

@@ -20,8 +20,8 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          username: ${{ secrets.DOCKER_HUB_USER }}
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta