add CI trigger on PR

Signed-off-by: Vipul Siddharth <[email protected]>

.github/workflows/hugo.yml

@@ -5,6 +5,9 @@ on:
   push:
     branches: ["main"]
 
+  pull_request:
+    branches: ["main"]
+
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
@@ -68,6 +71,8 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     needs: build
+
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
       - name: Deploy to GitHub Pages
         id: deployment