Fix small typo on website (#11)

Author: tekknolagi

index.html

@@ -457,7 +457,7 @@ <h3>3. INITIALIZE</h3>
         </p>
 
         <!-- Under the Hood Section -->
-        <h2>A PEAK UNDER THE HOOD</h2>
+        <h2>A PEEK UNDER THE HOOD</h2>
 
         <div class="code-block">
             <pre><span style="opacity: 0.5">// The entire trick:</span>
@@ -609,4 +609,4 @@ <h2>START BUILDING</h2>
         });
     </script>
 </body>
-</html>
+</html>