fix: update workflow trigger again

.github/workflows/python-packaging.yaml

@@ -1,16 +1,11 @@
 # based on https://github.com/Dao-AILab/flash-attention/blob/main/.github/workflows/publish.yml
 name: Build wheels
 
-# on:
-#   push:
-#     branches:
-#       - main
-#     tags:
-#       - "*"
-#   pull_request:
-#   workflow_dispatch:
-
 on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
   pull_request:
 
 jobs: