ci: update image build trigger

Author: alexcheng1982

.github/workflows/docker-publish.yaml

@@ -1,9 +1,9 @@
 name: Create and publish a Docker image
 
 on:
-  push:
-    branches: [ 'release' ]
-
+  release:
+    types: [ created ]
+    
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: ${{ github.repository }}