Allow long text in more_info

Author: Blake Bertuccelli-Booth

models/db.php

@@ -730,7 +730,7 @@ public static function create_alerts_table(){
                 `url` text,
                 `message` text,
                 `tags` text,
-                `more_info` text,
+                `more_info` longtext,
                 `archived` BOOLEAN NOT NULL DEFAULT 0,
                 PRIMARY KEY (`id`)
             ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;";