do not run pages build on every commit

Author: earlduque

.github/workflows/pages.yml

@@ -2,10 +2,6 @@
 name: Deploy GitHub Pages
 
 on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
   workflow_dispatch:
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages