ci: allow builds on website branch

.github/workflows/website.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - master
+      - website
   pull_request:
 
 jobs:
@@ -26,7 +27,6 @@ jobs:
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
-        if: github.ref == 'refs/heads/master'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./public