Merge pull request #864 from suketa/change-published-branch

change create published branch

Author: suketa

.github/workflows/make_documents.yml

@@ -31,5 +31,5 @@ jobs:
       uses: peaceiris/actions-gh-pages@v3
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
-        publish_branch: main
+        publish_branch: gh-pages
         publish_dir: ./docs