Linker::link() and Linker::linkKnown() functions are deprecated as of MediaWiki 1.28, and the new LinkRenderer is preferred instead.
https://doc.wikimedia.org/mediawiki-core/master/php/classLinker.html
./PageForms/includes/PF_Hooks.php: $text = Linker::linkKnown( $sp->getPageTitle(), $editMsg, [], $linkParams );