[ch579]

Some README files in `examples/cms-*` were linking to a documentation markdown file inside the repo (e.g. `/docs/basic-features/pages.md`) instead of the documentation website. We should always link to the documentation website from an example README file because (1) the website has better UX and (2) as we’re creating the examples pages on `next-site` (https://github.com/vercel/next-site/pull/672), we’d like to avoid extra processing of markdown content.