docs: fix broken sub-menu docs (#38930)
docs: fix broken sub-menu docs (#38930)

* Fix broken sub-menu docs

* Update components/menu/index.en-US.md

Co-authored-by: afc163 <1f47b30b0ff64fbf34ee708f2b94f6fccd6a0c8a@gmail.com>
ant-design/ant-design,ant-design/ant-design,ant-design/ant-design,ant-design/ant-design