Update Changelog.md for 2.3.1 release

Author: LinkDotNet Bot

CHANGELOG.md

@@ -6,7 +6,10 @@ All notable changes to **ValueStringBuilder** will be documented in this file. T
 
 ## [Unreleased]
 
+## [2.3.1] - 2025-02-20
+
 ### Changed
+
 - Optimized when the internal buffer should grow. Fixed by [@Aniobodo](https://github.com/Aniobodo).
 
 ## [2.3.0] - 2025-02-16
@@ -470,7 +473,8 @@ This release brings extensions to the `ValueStringBuilder` API. For `v1.0` the `
 
 - Initial release
 
-[unreleased]: https://github.com/linkdotnet/StringBuilder/compare/2.3.0...HEAD
+[unreleased]: https://github.com/linkdotnet/StringBuilder/compare/2.3.1...HEAD
+[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
 [2.1.0]: https://github.com/linkdotnet/StringBuilder/compare/2.0.0...2.1.0