Update changelog

Author: fbbdev

docs/src/content/docs/changelog.mdx

@@ -37,6 +37,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add `window-call` example to demonstrate how to know which window is calling a service by [@leaanthony](https://github.com/leaanthony)
 - Better panic handling by [@leaanthony](https://github.com/leaanthony)
 - New Menu guide by [@leaanthony](https://github.com/leaanthony)
+- Add doc comments for Service API by [@fbbdev](https://github.com/fbbdev) in [#4024](https://github.com/wailsapp/wails/pull/4024)
 
 ### Fixed