Update CHANGELOG.md

Author: minbi

CHANGELOG.md

@@ -32,7 +32,7 @@
 	- Fixed bug that caused Pinpoint endpoint profile to incorrectly calculate the number of profile attributes and metrics.
 
 - **Amazon Lex**
-	- Fixed aar file and added new architecture support arm64-v8a, mips, mips64, x86, x86_64.
+	- Fixed aar file and added new architecture support arm64-v8a, mips, mips64, x86, x86_64. See [issue #298](https://github.com/aws/aws-sdk-android/issues/298)
 
 ## [Release 2.4.7](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.4.7)