Update publish CI

Author: stevehipwell

.github/workflows/publish.yaml

@@ -34,7 +34,7 @@ jobs:
         uses: docker/login-action@v1
         with:
           registry: ghcr.io
-          username: ${{ github.repository_owner }}
+          username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Login to DockerHub