chore(test): fix failing test

Author: DiyaWadhwani

src/components/LeaderBoard/__tests__/Leaderboard.test.jsx

@@ -139,9 +139,7 @@ describe('Leaderboard page structure', () => {
 
   it('displays correct Total Time label and value', () => {
     renderWithProvider(<Leaderboard {...props} />);
-    const header = screen.getByText((content, element) => {
-      return element.tagName.toLowerCase() === 'span' && content === 'Total Time';
-    });
+    const header = screen.getByRole('columnheader', { name: /Tot(al|\.) Time/i });
     expect(header).toBeInTheDocument();
 
     const timeValue = screen.getByTitle('Tangible + Intangible time = Total time');