Fix typos

documentation/index.html

@@ -1664,7 +1664,7 @@ AdminLTE/
   <p class="lead">Direct Chat Markup</p>
   <pre class="prettyprint"><code class="html">
 &LT;-- Construct the box with style you want. Here we are using box-danger -->
-&LT;-- Then add the class direct-chat and choose the direct-chat-* contexual class -->
+&LT;-- Then add the class direct-chat and choose the direct-chat-* contextual class -->
 &LT;-- The contextual class should match the box, so we are using direct-chat-danger -->
 &LT;div class="box box-danger direct-chat direct-chat-danger">
   &LT;div class="box-header with-border">
@@ -1951,7 +1951,7 @@ AdminLTE/
 
 <section id='upgrade'>
   <h2 class='page-header'><a href="#upgrade">Upgrade Guide</a></h2>
-  <p class="lead">To upgrade from version 1.x to the lateset version, follow this guide.</p>
+  <p class="lead">To upgrade from version 1.x to the latest version, follow this guide.</p>
   <h3>New Files</h3>
   <p>Make sure you update all CSS and JS files that are related to AdminLTE. Otherwise, the layout will not
     function properly. Most important files are AdminLTE.css, skins CSS files, and app.js.</p>