Try cloning into ruby-bench

Author: k0kubun

.github/workflows/deploy.yml

@@ -29,7 +29,7 @@ jobs:
         with:
           repository: ruby/ruby-bench
           ref: ${{ steps.rdoc.outputs.ref }}
-          path: ../ruby-bench
+          path: ruby-bench
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: