Update CHANGELOG.md (#931)

CHANGELOG.md

@@ -13,6 +13,11 @@
   * Update logic to expose network related exceptions during API calls. The network related exceptions were not surfaced previously in API calls like getUserAttributes. Only the exceptions that conclusively indicate signed-out are used to trigger SIGNED_OUT_TOKENS_INVALID variants. See [issue #679](https://github.com/aws-amplify/aws-sdk-android/issues/679)
   * Reduced logging of unfound dependencies for the Hosted UI feature when not used.
   * Delay usage of drop-in UI dependencies until `showSignIn()` is called.
+
+### Misc. Updates
+
+* Model updates for the following services
+  * Amazon Lambda
 
 ## [Release 2.13.3](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.13.3)