misc(ci): Update doc only on release

Author: flozz

.github/workflows/gh-pages.yml

@@ -2,7 +2,9 @@ name: "Build and deploy Github pages"
 
 on:
   push:
-    branches: master
+    tags:
+      - "v[0-9]+\\.[0-9]+\\.[0-9]+"
+      - "v[0-9]+\\.[0-9]+\\.[0-9]+-[0-9]+"
 
 jobs: