The 'Guide' web page has stale references to bitbucket. The attached patch against the hg-website repo takes a pass at an update.
Remove stale bitbucket refs. Some spelling updates. BitBucket dropped support for mercurial repos in 2020. Fix stale references to it in favor of more generic language about other hosting services (and point to a curated list on the wiki).
Added smf (current website repo meister)
See also issue 6518