Update AWS dropdown with new and more links

Author: brucejlin1

_includes/quick_start_cloud_options.html

@@ -17,8 +17,10 @@
       </div>
 
       <ul>
-        <li><a href="https://aws.amazon.com/pytorch/">Amazon SageMaker</a></li>
-        <li><a href="https://aws.amazon.com/pytorch/">AWS Deep Learning AMIs</a></li>
+        <li><a href="https://aws.amazon.com/pytorch/">PyTorch on AWS</a></li>
+        <li><a href="https://sagemaker.readthedocs.io/en/stable/using_pytorch.html">Amazon SageMaker</a></li>
+        <li><a href="https://docs.aws.amazon.com/deep-learning-containers/latest/devguide/deep-learning-containers-ec2-tutorials-training.html#deep-learning-containers-ec2-tutorials-training-pytorch">AWS Deep Learning Containers</a></li>
+        <li><a href="https://docs.aws.amazon.com/dlami/latest/devguide/tutorial-pytorch.html">AWS Deep Learning AMIs</a></li>        
       </ul>
     </div>
   </div>