docs: fix comment

Author: kenjis

system/Router/RouteCollection.php

@@ -623,7 +623,7 @@ public function group(string $name, ...$params)
         $oldOptions = $this->currentOptions;
 
         // To register a route, we'll set a flag so that our router
-        // so it will see the group name.
+        // will see the group name.
         // If the group name is empty, we go on using the previously built group name.
         $this->group = $name ? trim($oldGroup . '/' . $name, '/') : $oldGroup;