docs: Update CHANGELOG for v0.8.1

Adds a new entry to the CHANGELOG.md for version v0.8.1, documenting
the addition of the `target_path` input.

Author: taj54

CHANGELOG.md

@@ -4,7 +4,11 @@ All notable changes for each version of the Ambient Music extension.
 
 ---
 
-## Unreleased
+## v0.8.1 2025 08 24
+
+### Added
+
+- Added `target_path` input to specify the working directory for version bumping.
 
 ## v0.8.0 2025 08 24