Fix link case in Music Player Clone reference

Author: nirajxdev

index.html

@@ -148,7 +148,7 @@ <h2 class="text-lg font-medium uppercase tracking-widest text-gray-700 mb-6">
                 </a>
             </li>  
             <li>
-                <a href="11_Music-Player-Clone/" 
+                <a href="11_music-player-clone/" 
                    class="flex justify-between items-center border border-gray-200 p-4 
                           hover:bg-black hover:text-white transition-colors duration-200 group">
                     <span class="text-xl font-semibold group-hover:underline">
@@ -167,4 +167,4 @@ <h2 class="text-lg font-medium uppercase tracking-widest text-gray-700 mb-6">
 
     </div>
 </body>
-</html>
+</html>