[PR] fix: update toc links in hoc pages
[PR] fix: update toc links in hoc pages

Summary:
fix: update hoc toc links
Pull Request resolved: https://github.com/facebook/flow/pull/7278

Differential Revision: D13505052

Pulled By: mroch

fbshipit-source-id: abc63bbde7e68e5c715d2e1a6b3e16e9b742a155

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow