Update index.tsx

Author: ajay-dhangar

src/dsa/searching-algorithms/LinearSearchVisualizer/index.tsx

@@ -54,7 +54,7 @@ const LinearSearchVisualizer: React.FC = () => {
       <div className="array-container">
         {array.map((num, index) => (
           <div
-            key={index}
+            key={`${num}-${index}`}
             className={`array-item ${index === currentIndex ? 'current' : ''} ${
               index === foundIndex ? 'found' : ''
             }`}