Update CHANGELOG.md

Author: thomashoneyman

CHANGELOG.md

@@ -10,6 +10,10 @@ New features:
 
 Bugfixes:
 
+Other improvements:
+
+## [v8.1.1](https://github.com/purescript-node/purescript-node-fs/releases/tag/v8.1.1) - 2022-10-24
+
 Other improvements:
 - Use `EffectFn` throughout instead of unsafe `mkEffect` utility (#70 by @colinwahl)