Fix test assertions for hideInternalTopics toggle behavior

Update the test in ListPage.spec.tsx to correctly assert the initial
state of 'hideInternalTopics' as truthy, then toggling to falsy and
back to truthy. This ensures the test matches the component's new behavior.

Author: Devansh-ops

frontend/src/components/Topics/List/__tests__/ListPage.spec.tsx

@@ -36,11 +36,11 @@ describe('ListPage Component', () => {
       const switchInput = screen.getByLabelText('Show Internal Topics');
       expect(switchInput).toBeInTheDocument();
 
-      expect(global.localStorage.getItem('hideInternalTopics')).toBeNull();
-      await userEvent.click(switchInput);
       expect(global.localStorage.getItem('hideInternalTopics')).toBeTruthy();
       await userEvent.click(switchInput);
-      expect(global.localStorage.getItem('hideInternalTopics')).toBeNull();
+      expect(global.localStorage.getItem('hideInternalTopics')).toBeFalsy();
+      await userEvent.click(switchInput);
+      expect(global.localStorage.getItem('hideInternalTopics')).toBeTruthy();
     });
 
     it('renders the TopicsTable', () => {