CI: restrict ci.yml to main branch only (stop triggering on v1.1.1)

Author: Paururo

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: [main, "v*"]
+    branches: [main]
   pull_request:
     branches: [main]