CI: reword step names

Author: vitalyster

.github/workflows/publish.yml

@@ -25,7 +25,7 @@ jobs:
       uses: docker/setup-qemu-action@v1
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1
-    - name: Login to DockerHub
+    - name: Login to the container registry
       if: github.event_name != 'pull_request'
       uses: docker/login-action@v1 
       with: