fix: notification courses failed test cases

src/notification-preferences/NotificationCourses.test.jsx

@@ -64,6 +64,7 @@ describe('Notification Courses', () => {
       }),
     }));
     auth.getAuthenticatedUser = jest.fn(() => ({ userId: 3 }));
+    window.lightningjs = null;
   });
 
   afterEach(() => jest.clearAllMocks());

src/notification-preferences/NotificationPreferences.test.jsx

@@ -109,7 +109,6 @@ describe('Notification Preferences', () => {
       }),
     }));
     auth.getAuthenticatedUser = jest.fn(() => ({ userId: 3 }));
-    window.lightningjs = null;
   });
 
   afterEach(() => jest.clearAllMocks());