Update CHANGELOG.md

Author: preetkaran20

CHANGELOG.md

@@ -3,8 +3,13 @@ All notable changes to this add-on will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## Unreleased
+
+### Added
+ - Support for validating usage of publicly well known HMac secrets for signing JWT.
+
 ## [1.0.0] - 2020-09-03
 
  - First version of JWT Support.
    - Contains scanning rules for basic JWT related vulnerabilities.
-   - Contains JWT Fuzzer for fuzzing the JWT's present in the request.
+   - Contains JWT Fuzzer for fuzzing the JWT's present in the request.