docs: adds CHANGELOG entry detailing legacy function definition corrections

Author: weierophinney

CHANGELOG.md

@@ -6,7 +6,7 @@ Versions prior to 1.0 were originally released as `phly/conduit`; please visit
 its [CHANGELOG](https://github.com/phly/conduit/blob/master/CHANGELOG.md) for
 details.
 
-## 3.2.1 - TBD
+## 3.2.1 - 2020-01-07
 
 ### Added
 
@@ -26,7 +26,7 @@ details.
 
 ### Fixed
 
-- Nothing.
+- Fixes all legacy proxying function definitions to add missing return statements.
 
 ## 3.2.0 - 2019-06-12