Update nix-package.yml

.github/workflows/nix-package.yml

@@ -53,4 +53,4 @@ jobs:
           git config user.email "[email protected]"
           git config user.name "GitHub Actions"
           git commit -am "Update version and hash in default.nix to $latest_annotated_tag_without_v"
-          git push
+          git push origin HEAD:main