docs: fix changelog typos

Author: mtrezza

packages/dart/CHANGELOG.md

@@ -1,6 +1,6 @@
-## [3.1.1](https://github.com/parse-community/Parse-SDK-Flutter/compare/V3.1.0...dart-3.1.1)
+## [3.1.1](https://github.com/parse-community/Parse-SDK-Flutter/compare/V3.1.0...dart-3.1.1) (2022-05-30)
 
-### Refactor
+### Refactors
 
 * fix analyzer code style warnings ([#733](https://github.com/parse-community/Parse-SDK-Flutter/issues/733))
 

packages/flutter/CHANGELOG.md

@@ -1,6 +1,6 @@
-## [3.1.2](https://github.com/parse-community/Parse-SDK-Flutter/compare/flutter-3.1.1...flutter-3.1.2)
+## [3.1.2](https://github.com/parse-community/Parse-SDK-Flutter/compare/flutter-3.1.1...flutter-3.1.2) (2022-05-30)
 
-### Refactoring
+### Refactors
 
 * fix analyzer code style warnings ([#733](https://github.com/parse-community/Parse-SDK-Flutter/issues/733))