Use GitHub container for publishing (#200)

Author: charpeni

.github/workflows/publish.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   publish:
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     permissions:
       contents: read
       id-token: write # Required for OIDC