Updates Changelog

Author: LordHepipud

doc/100-General/10-Changelog.md

@@ -11,7 +11,7 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
 
 [Issues and PRs](https://github.com/Icinga/icinga-powershell-framework/milestone/32)
 
-## 1.12.1 (tbd)
+## 1.12.1 (2024-04-09)
 
 [Issues and PRs](https://github.com/Icinga/icinga-powershell-framework/milestone/33)