ci: add pr events to run deploy

Author: xunpod

.github/workflows/pages.yaml

@@ -4,7 +4,9 @@ on:
   push:
     branches:
       - master # default branch
-
+  pull_request:
+    branches:
+      - master # default branch
 jobs:
   pages:
     runs-on: ubuntu-latest
@@ -36,4 +38,4 @@ jobs:
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./website
+          publish_dir: ./website