chore: bump version to 3.8.1

Author: Valentin Vetter

playground/misc/misc-3-release-notes.md

@@ -2,12 +2,16 @@
 
 The CodinGame SDK is regularly updated and improved. This document lets you know what changed in the latest releases.
 
-## 3.8.0
+## 3.8.1
 
 ### 🎁 New features
 
 - The [ViewportModule](playground/extensions/extensions-6-viewport.md) has been added
 
+## 3.8.0
+
+- Broken version, use 3.8.1
+
 ## 3.7.0
 
 ### 🎁 New features