fix: use permalink and remove license mention

Co-authored-by: ReenigneArcher <42013603+ReenigneArcher@users.noreply.github.com>

Author: zdimension

Contents/Resources/web/js/plexauth.js

@@ -1,5 +1,4 @@
-// Code from https://github.com/Tautulli/Tautulli/blob/master/data/interfaces/default/js/script.js.
-// Licensed under the GNU General Public License v3 (GPLv3)
+// Reference: https://github.com/Tautulli/Tautulli/blob/d019efcf911b4806618761c2da48bab7d04031ec/data/interfaces/default/js/script.js
 
 var p = {
     name: 'Unknown',