Update changelog

CHANGELOG.md

@@ -7,10 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Optimised performance of "Show Connections" calculations by moving most of the effort to a thottled Worker thread. This also improves script editing performance when Connections are visible.
+
 ### Fixed
 
 - Fix issue where adding a new song wouldn't warn about unsaved changes in current song
 - Fix issue where adding a song with an already existing name wouldn't auto select the newly created song
+- Fix issue where scene connection lines could get stuck in place if custom scripts that change scenes are called multiple times from the same scene
 
 ## [4.1.2] - 2024-09-09