Update CHANGELOG.md

Author: karthiksaligrama

CHANGELOG.md

@@ -1,5 +1,5 @@
 # Change Log - AWS SDK for Android
-## [Release 2.4.0] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.4.0) (03/21/2017)
+## [Release 2.4.0](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.4.0) (03/21/2017)
 
 ### Improvements:
 - **Amazon Lex**:`LexVoiceButton` will now show an image of a bot when audio response from lex is being played.
@@ -21,7 +21,7 @@
 - **Amazon S3**: Fixed a bug where when using `setAccelerateModeEnabled` caused uploads to fail. See [issue #264](https://github.com/aws/aws-sdk-android/issues/264).
 - **General** : Fixed a bug which caused incompatibility between maven releases and releases on [marketing page](https://aws.amazon.com/mobile/sdk).
 
-## [Release 2.3.9] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.9) (02/02/2017)
+## [Release 2.3.9](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.9) (02/02/2017)
 
 ### Improvements:
 
@@ -44,7 +44,7 @@
 - **Amazon S3**: Fixed a bug that caused TransferObserver.getBytesTransferred() to always return 0. See [issue #217](https://github.com/aws/aws-sdk-android/pull/217).
 - **Amazon S3**: Fixed a race condition in TransferService. See [issue #197](https://github.com/aws/aws-sdk-android/pull/197).
 
-## [Release 2.3.7] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.7) (12/13/2016)
+## [Release 2.3.7](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.7) (12/13/2016)
 
 ### New Features
 - **Support for Amazon Rekognition**: Rekognition is a deep-learning based service to search, verify and organize images. With Rekognition, you can detect objects, scenes, and faces in images. You can also search and compare faces.
@@ -61,7 +61,7 @@
 - **Amazon Cognito Identity Provider**: Fix a bug where `NewPasswordContinuation` throws `CognitoParameterInvalidException: Missing required attribute` even when the required user attributes have been set. See [issue](https://github.com/aws/aws-sdk-android/pull/216).
 
 
-## [Release 2.3.6] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.6) (12/07/2016)
+## [Release 2.3.6](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.6) (12/07/2016)
 
 ### Improvements
 - **AWS Core Runtime**: Added Support for `ca-central-1`/YUL region in the SDK.
@@ -73,25 +73,25 @@
 - **Amazon Mobile Analytics**: Ensure session file directories exist before saving
 
 
-## [Release 2.3.5] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.5) (12/01/2016)
+## [Release 2.3.5](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.5) (12/01/2016)
 
 ### New Features
 - **Support for Amazon Pinpoint**: Amazon Pinpoint makes it easy to run targeted campaigns to improve user engagement. Pinpoint helps you understand your users behavior, define who to target, what messages to send, when to deliver them, and tracks the results of the campaigns.
 
 
-## [Release 2.3.4] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.4) (11/30/2016)
+## [Release 2.3.4](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.4) (11/30/2016)
 
 ### New Features
 - **Support for Amazon Lex - Beta**: Amazon Lex is a service for building conversational interactions into any application using voice and text. With Lex, the same conversational engine that powers Amazon Alexa is now available to any developer, enabling you to build sophisticated, natural language, conversational bots (chatbots) into your new and existing applications. Amazon Lex provides the deep functionality and flexibility of automatic speech recognition (ASR) for converting speech to text and natural language understanding (NLU) to understand the intent of the text. This allows you to build highly engaging user experiences with lifelike, conversational interactions.
 
 - **Support for Amazon Polly**: Amazon Polly is a service that turns text into lifelike speech, making it easy to develop applications that use high-quality speech to increase engagement and accessibility. With Amazon Polly the developers can build speech-enabled apps that work in multiple geographies.
 
-## [Release 2.3.3] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.3) (10/11/2016)
+## [Release 2.3.3](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.3) (10/11/2016)
 
 ### Improvements
 - **AWS Core Runtime Library**: Support for `us-east-2/CMH` region in SDK.
 
-## [Release 2.3.2] (https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.2) (10/06/2016)
+## [Release 2.3.2](https://github.com/aws/aws-sdk-android/releases/tag/release_v2.3.2) (10/06/2016)
 
 ### Improvements
 - **Amazon Cognito Identity Provider**: