Apply review suggestion - use getInput method

Co-authored-by: jsanders <[email protected]>

Author: richard67

modules/mod_banners/src/Helper/BannersHelper.php

@@ -42,7 +42,7 @@ public function getBanners(Registry $params, CMSApplication $app)
         /** @var BannersModel $model */
         $model = $app->bootComponent('com_banners')->getMVCFactory()->createModel('Banners', 'Site', ['ignore_request' => true]);
 
-        $input    = $app->input;
+        $input    = $app->getInput();
         $keywords = [];
 
         // Check if the current view is an article