Add PR 1909 to changelog
### SDK Features
### SDK Enhancements
+* `aws/endpoints`: Add Get Region description to endpoints package ([#1909](https://github.com/aws/aws-sdk-go/pull/1909))
+ * Adds exposing the description field of the endpoints Region struct.
+ * Fixes [#1194](https://github.com/aws/aws-sdk-go/issues/1194)
### SDK Bugs
* Fix XML unmarshaler not correctly unmarshaling list of timestamp values ([#1894](https://github.com/aws/aws-sdk-go/pull/1894))
