Add reference to new exception thrown to changelog

Author: Sephster

CHANGELOG.md

@@ -6,7 +6,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 ### Fixed
-- Use string 'empty' instead of InMemory::plainText('') to avoid new empty string exception thrown by lcobucci/jwt (PR #1282)
+- Use InMemory::plainText('empty', 'empty') instead of InMemory::plainText('') to avoid [new empty string exception](https://github.com/lcobucci/jwt/pull/833) thrown by lcobucci/jwt (PR #1282)
 
 ## [8.3.4] - released 2022-04-07
 ### Fixed