rename padde to paddle

index.html

@@ -91,7 +91,7 @@
     <div class="container">
         <div class="row">
             <div class="col-lg-8 col-lg-offset-2 text-center">
-                <h2 class="section-heading">What's PaddlePadde</h2>
+                <h2 class="section-heading">What's PaddlePaddle</h2>
                 <hr class="light">
 		<p class="text-faded">PaddlePaddle (PArallel Distributed Deep LEarning) is an easy-to-use, efficient, flexible and scalable deep learning platform, which is originally developed by Baidu scientists and engineers for the purpose of applying deep learning to many products at Baidu.
 		</p>