Prepare to release 2.3.8

Author: colinodell

CHANGELOG.md

@@ -6,6 +6,8 @@ Updates should follow the [Keep a CHANGELOG](https://keepachangelog.com/) princi
 
 ## [Unreleased][unreleased]
 
+## [2.3.8] - 2022-12-10
+
 ### Fixed
 
 - Fixed parsing issues when `mb_internal_encoding()` is set to something other than `UTF-8` (#951)
@@ -510,7 +512,8 @@ No changes were introduced since the previous release.
     - Alternative 1: Use `CommonMarkConverter` or `GithubFlavoredMarkdownConverter` if you don't need to customize the environment
     - Alternative 2: Instantiate a new `Environment` and add the necessary extensions yourself
 
-[unreleased]: https://github.com/thephpleague/commonmark/compare/2.3.7...main
+[unreleased]: https://github.com/thephpleague/commonmark/compare/2.3.8...main
+[2.3.8]: https://github.com/thephpleague/commonmark/compare/2.3.7...2.3.8
 [2.3.7]: https://github.com/thephpleague/commonmark/compare/2.3.6...2.3.7
 [2.3.6]: https://github.com/thephpleague/commonmark/compare/2.3.5...2.3.6
 [2.3.5]: https://github.com/thephpleague/commonmark/compare/2.3.4...2.3.5