General: Replace Codex links with their HelpHub counterparts - My Sites screen

Props chaton666.
See #48987.


git-svn-id: https://develop.svn.wordpress.org/trunk@54225 602fd350-edb4-49c9-b593-d223f7449a82

Author: audrasjb

src/wp-admin/my-sites.php

@@ -49,7 +49,7 @@
 
 get_current_screen()->set_help_sidebar(
 	'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
-	'<p>' . __( '<a href="https://codex.wordpress.org/Dashboard_My_Sites_Screen">Documentation on My Sites</a>' ) . '</p>' .
+	'<p>' . __( '<a href="https://wordpress.org/support/article/network-admin-sites-screen/">Documentation on My Sites</a>' ) . '</p>' .
 	'<p>' . __( '<a href="https://wordpress.org/support/">Support</a>' ) . '</p>'
 );