ci: separate branch and tag triggers for better control

Author: BohuTANG

.github/workflows/python.yml

@@ -4,10 +4,11 @@ on:
   push:
     branches:
       - main
-    tags:
-      - 'v*'
     paths:
       - 'python/**'
+  push:
+    tags:
+      - 'v*'
   pull_request:
     branches:
       - main