Avoid CI workflow is running on release publications

and within twice, once for the tag pushed for release and second for the release event.
This was found in https://stackoverflow.com/questions/70743715/how-do-i-configure-a-github-actions-workflow-so-it-does-not-run-on-a-tag-push

.github/workflows/ci.yml

@@ -1,5 +1,9 @@
 name: CI
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - "*"
+  pull_request:
 
 jobs:
   build: