change default branch

Author: khuyentran1401

.github/workflows/deploy.yml

@@ -3,7 +3,7 @@ name: Deploy to GitHub Pages
 on:
   push:
     branches:
-      - main
+      - master
 
 jobs:
   deploy:
@@ -14,7 +14,7 @@ jobs:
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v4
-        if: github.ref == 'refs/heads/main'
+        if: github.ref == 'refs/heads/master'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./build