fix: PHP 8.3 string interpolation and remove Steam Workshop from main nav

Agent-Logs-Url: https://github.com/GameServerPanel/GSP/sessions/ddf9efe5-279d-4197-98e5-b3fc5b28ea0c

Co-authored-by: iaretechnician <2749183+iaretechnician@users.noreply.github.com>

modules/steam_workshop/module.php

@@ -23,7 +23,7 @@
  */
 // Module general information
 $module_title = "Steam Workshop";
-$module_version = "2.1";
+$module_version = "2.2";
 $db_version = 1;
 $module_required = TRUE;
 $module_menus = array();