Fix duplicate Number Guessing Game cards

Author: anujsharma8d

web-app/index.html

@@ -1265,11 +1265,6 @@ <h3 class="timeline-title">thrive</h3>
 <h3>BlackJack21</h3>
 <p>Beat the dealer!</p>
 <button class="btn-play">Play Now</button>
-</div><div class="project-card" data-category="games" data-project="number-guessing">
-<div class="card-icon">🎯</div>
-<h3>Number Guessing</h3>
-<p>Guess the secret number!</p>
-<button class="btn-play">Play Now</button>
 </div><div class="project-card" data-category="math" data-project="fibonacci">
 <div class="card-icon">✨</div>
 <h3>Fibonacci Series</h3>