Update outdated link (#42)

Author: jimmyfagan

README.md

@@ -20,7 +20,7 @@ This Python software development kit (SDK) provides tools and resources for deve
 
 You'll need a sandbox account and sample access token to access data from the Blue Button 2.0 API.
 
-To learn how to create a sandbox account and generate a sample access token, see **[Try the API](https://bluebutton.cms.gov/developers/#try-the-api)**.
+To learn how to create a sandbox account and generate a sample access token, see **[Getting started in the developer sandbox](https://bluebutton.cms.gov/developers/#getting-started-in-the-developer-sandbox)**.
 
 
 ## Installation<a id="installation"></a>