updates version number in changelog

Author: Evan Greer

CHANGELOG.md

@@ -2,7 +2,7 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## 6.4.16
+## 6.5.0
 ### Added
 - `sendRequewstWithRetries` function added as part of the `NetworkHelperclass` which allows for multiple retries to be triggered when a 500 and above status code is returned in the response