Update grading controller test

Author: GabrielCWT

test/cadet_web/admin_controllers/admin_grading_controller_test.exs

@@ -890,9 +890,9 @@ defmodule CadetWeb.AdminGradingControllerTest do
         "assessment" => %{
           "id" => assessment.id,
           "title" => assessment.title,
-          "summary_short" => assessment.summary_short,
-          "summary_long" => assessment.summary_long,
-          "cover_picture" => assessment.cover_picture,
+          "summaryShort" => assessment.summary_short,
+          "summaryLong" => assessment.summary_long,
+          "coverPicture" => assessment.cover_picture,
           "number" => assessment.number,
           "story" => assessment.story,
           "reading" => assessment.reading