Update index.html

Author: sheetalsingh08

experiment/simulation/index.html

@@ -388,7 +388,7 @@ <h1 style="font-size: 44px; color: white;">Analysis of Strings</h1>
         <a href="concatenation.html" style="font-family:  Ubuntu;"><button class="btn btn-primary">Concatenate</button></a>
         <a href="slicing.html" style="font-family:  Ubuntu;"><button class="btn btn-primary">Slicing</button></a>
         <a href="reverse.html" style="font-family:  Ubuntu;"><button class="btn btn-primary">Reverse</button></a>
-        <a href="repeat.html" style="font-family:  Ubuntu;"><button class="btn btn-primary">Repeation</button></a>
+        <a href="repeat.html" style="font-family:  Ubuntu;"><button class="btn btn-primary">Repetition</button></a>
     </div>
     <div class="container-fluid">
         <div class="straight">