Update ghcr.yml

Author: ankitprasad2005

.github/workflows/ghcr.yml

@@ -2,9 +2,9 @@
 name: Build and Push Docker Image to ghcr.io
 
 on:
-  push:
-    branches:
-      - master
+  release:
+    types:
+      - created
 
 env:
   REGISTRY: ghcr.io