Update Changelog.md

Author: williamdes

Changelog.md

@@ -1,6 +1,6 @@
 1.4.3 (03/11/2017)
  - Added sqlMessage to Error callback object           #665
- - Normalized sqlState to a string of 5 chars
+ - Normalized sqlState to a string of 5 chars          #667
    as Mysql specifies it
 1.4.2 ( 27/08/2017 )
  - fix null value incorrectly returned as empty