ci: disable deployment when not on main branch

Author: LayZeeDK

.github/workflows/website.yml

@@ -46,9 +46,9 @@ jobs:
 
   deploy:
     name: Deploy website to GitHub Pages
-    # if: >
-    #   github.ref == 'refs/heads/main' && (github.event_name ==
-    #   'workflow_dispatch' || github.event_name == 'push')
+    if: >
+      github.ref == 'refs/heads/main' && (github.event_name ==
+      'workflow_dispatch' || github.event_name == 'push')
     needs: build
     runs-on: ubuntu-latest