build: update dest dir in github workflow config

Author: lokesh-coder

.github/workflows/ghpages.yml

@@ -36,5 +36,5 @@ jobs:
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.BLOBS_APP_PUBLISH_TOKEN }}
-          publish_dir: ./build
+          publish_dir: ./public
           cname: blobs.app