Fix missed facultyID in office students upload

~dev_rating/application/classes/Controller/Office/Students.php

@@ -33,8 +33,9 @@ class Controller_Office_Students extends Controller_Environment_Office
         $errors = [];
 
         if (!empty($_FILES['students']) && $this->request->method() == 'POST') {
+            $facultyID = User::instance()->Faculty->ID;
             $file = $_FILES['students']['tmp_name'];
-            $errors = FileParser::uploadStudents($file, $_POST['facultyID']);
+            $errors = FileParser::uploadStudents($file, $facultyID);
         }
 
         $this->twig->set([