update CI for build api doc

.github/workflows/build-doc.yml

@@ -15,15 +15,12 @@ jobs:
           rustup target add riscv64gc-unknown-none-elf
           rustup component add llvm-tools-preview
           rustup component add rust-src
+          rm -rf public/${{ github.ref_name }}
+          mkdir -p public/${{ github.ref_name }}
           cd os
           cargo doc --no-deps --verbose
+          cp -r ./target/riscv64gc-unknown-none-elf/doc ../public/${{ github.ref_name }}
       - name: Deploy to Github Pages
-        uses: peaceiris/actions-gh-pages@v3
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./os/target/riscv64gc-unknown-none-elf/doc
-          destination_dir: ./docs/${{ github.ref_name }}
-      - name: Deploy index.html to Github Pages
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}