fix: Broken lint

Author: ChrisChV

src/course-unit/unit-sidebar/unit-info/ComponentInfoSidebar.test.tsx

@@ -89,6 +89,7 @@ const mockSidebarContext = {
   open: jest.fn(),
   toggle: jest.fn(),
   readOnly: false,
+  isVertical: true,
 };
 
 const renderComponent = () =>