Update to jQuery 3.6.1 (#6491)

This commit updates FusionPBX to use jQuery 3.6.1 and also adds a fallback to the other variable name for offhook autodial on the HT802.

resources/jquery/jquery.min.js.php

@@ -5,6 +5,6 @@ header('Content-type: text/javascript; charset: UTF-8');
 header('Cache-Control: must-revalidate');
 header('Expires: '.gmdate('D, d M Y H:i:s',time()+3600).' GMT');
 
-include_once 'jquery-3.4.1.min.js';
+include_once 'jquery-3.6.1.min.js';
 
-?>
+?>