documentation: add cheat sheet links (#1310)

Co-authored-by: Scott Smart <42444435+sesmart@users.noreply.github.com>

Author: shalini9894

README.md

@@ -9,6 +9,9 @@
 
 The Amazon Braket Python SDK is an open source library that provides a framework that you can use to interact with quantum computing hardware devices through Amazon Braket.
 
+## Quick reference
+For a one-page overview of common Amazon Braket SDK calls, see the [Amazon Braket SDK cheat sheet](https://amazon-braket.github.io/amazon-braket-sdk-python/).
+
 ## Prerequisites
 Before you begin working with the Amazon Braket SDK, make sure that you've installed or configured the following prerequisites.
 

doc/index.rst

@@ -9,6 +9,9 @@ This documentation provides information about the Amazon Braket Python SDK libra
 homepage is in Github https://github.com/amazon-braket/amazon-braket-sdk-python. The project
 includes SDK source, installation instructions, and other information.
 
+For a one-page overview of common Amazon Braket SDK calls, see the
+`Amazon Braket SDK cheat sheet <https://amazon-braket.github.io/amazon-braket-sdk-python/>`_.
+
 ***************
 Getting Started
 ***************