Ensure only version branches trigger this

Author: dreamer-coding

.github/workflows/conan_ci.yml

@@ -5,12 +5,13 @@ on:
     - cron: '15 21 * * *'
   push:
     branches:
-      - main
+      # Match branches with version numbers like 1.2.8, 2.0.0, etc.
+      - '[0-9]+.[0-9]+.[0-9]+'
     tags:
-      - 'v*'
+      - 'v*'       # Tag releases like v1.2.8
   pull_request:
     branches:
-      - main
+      - '[0-9]+.[0-9]+.[0-9]+'
 
 jobs:
   build: