update CHANGELOG and author list

Author: rkingsbury

AUTHORS.md

@@ -7,9 +7,10 @@ Other contributors, listed alphabetically, are:
 
 - Arpit Bhardwaj (@abhardwaj73)
 - Dhruv Duseja (@DhruvDuseja)
+- Hernan Grecco (@hgrecco)
 - Jaebeom Park (@Jaebeom-P)
 - Kirill Pushkarev (@kirill-push)
 - Andrew Rosen (@arosen93)
-- Hernan Grecco (@hgrecco)
+- Sui Xiong Tay (@SuixiongTay)
 
 (If you think that your name belongs here, please let the maintainer know)

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   without specifying an oxidation state. For example, `get_total_amount('N')` could raise
   an exception in a solution containing `Na` (but no `N`) due to a flaw in a logical
   test.
+- `Solution._adjust_charge_balance`: Removed a misleading and redundant log message (#162, @SuixiongTay)
 
 ### Added