fix login to ghcr.io

.github/workflows/docker-test.yml

@@ -20,7 +20,7 @@ jobs:
               uses: docker/login-action@v1
               with:
                   registry: ghcr.io
-                  username: ${{ secrets.repository_owner }}
+                  username: ${{ github.actor }}
                   password: ${{ secrets.GITHUB_TOKEN }}
             - name: Build and Push test
               uses: docker/build-push-action@v2