Fix various typos (#20338)
* Fix various typos
Found via `codespell -q 3 -S ./options/locale,./options/license,./public/vendor -L actived,allways,attachements,ba,befores,commiter,pullrequest,pullrequests,readby,splitted,te,unknwon`
Co-authored-by: zeripath <art27@cantab.net>