[docs] [issue40576] Align docs for list.sort, sorted, and on the website

Sam Lijin <python@sxlijin.com> added the comment: I do clarify that they're not the same thing and that `sorted` accepts any iterable: https://github.com/python/cpython/pull/20017/files#diff-30d76a3dc0c885f86917... ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue40576> _______________________________________