Update Changelog.md for 2.4.0 release

Author: LinkDotNet Bot

CHANGELOG.md

@@ -6,6 +6,8 @@ All notable changes to **ValueStringBuilder** will be documented in this file. T
 
 ## [Unreleased]
 
+## [2.4.0] - 2025-02-21
+
 ### Added
 
 - Added `ToString(int)` (by @Joy-less in #239)
@@ -487,7 +489,8 @@ This release brings extensions to the `ValueStringBuilder` API. For `v1.0` the `
 
 - Initial release
 
-[unreleased]: https://github.com/linkdotnet/StringBuilder/compare/2.3.1...HEAD
+[unreleased]: https://github.com/linkdotnet/StringBuilder/compare/2.4.0...HEAD
+[2.4.0]: https://github.com/linkdotnet/StringBuilder/compare/2.3.1...2.4.0
 [2.3.1]: https://github.com/linkdotnet/StringBuilder/compare/2.3.0...2.3.1
 [2.3.0]: https://github.com/linkdotnet/StringBuilder/compare/2.2.0...2.3.0
 [2.2.0]: https://github.com/linkdotnet/StringBuilder/compare/2.1.0...2.2.0