ci: revert username

Author: jef

.github/workflows/release.yaml

@@ -41,7 +41,7 @@ jobs:
         uses: docker/login-action@v2
         with:
           registry: ghcr.io
-          username: github
+          username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push Docker image
         uses: docker/build-push-action@v3