Disable login step during pull requests

My hope is that the other steps would still work without this.
Otherwise, I will have to disable the entire docker job during pull
requsets.

Author: coldfix

.github/workflows/publish.yml

@@ -39,6 +39,7 @@ jobs:
       - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3
       - uses: docker/login-action@v3
+        if: github.event_name != "pull_request"
         with:
           username: coldfix
           password: ${{ secrets.DOCKERHUB_TOKEN }}