Update index.html

index.html

@@ -335,7 +335,7 @@ <h3>Selectors</h3>
     <ul>
       <li>Use classes over generic element tag for optimum rendering performance.</li>
       <li>Avoid using several attribute selectors (e.g., <code>[class^="..."]</code>) on commonly occuring components. Browser performance is known to be impacted by these.</li>
-      <li>Keep selectors short and strive to limit the number of elements in each selector to three.</li>
+      <li>Keep selectors short and strive to limit the number of elements in each selector to two.</li>
       <li>Scope classes to the closest parent <strong>only</strong> when necessary (e.g., when not using prefixed classes).</li>
     </ul>
     <p>Additional reading:</p>