Fix typo in Leaderboard link text

Author: anonymous

index.html

@@ -65,7 +65,7 @@ <h1 class="text-nowrap"><b>JavaEval</b></h1>
           A Benchmark of Object-Oriented Code Generation for Evaluating Large Language Models
         </p>
         <p class="text-center">
-          <a href="./leaderboard.html">Leader Board</a>
+          <a href="./leaderboard.html">Leaderboard</a>
         </p>
       </div>
     </div>