Update index.html

Author: benhatsor

index.html

@@ -343,7 +343,7 @@ <h2 class="color-1 weight-title-h font-title section__title center">A codeful of
 
   const height = 51.4; // el.clientHeight;
 
-  let isVisible = (elemTop + height) < window.innerHeight;
+  const isVisible = (elemTop + height) < window.innerHeight;
 
   return isVisible;