Update Changelog

Author: oleibman

CHANGELOG.md

@@ -5,14 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com)
 and this project adheres to [Semantic Versioning](https://semver.org).
 
-# TBD - 2.3.7
+# 2025-01-26 - 2.3.7
 
 ### Fixed
 
 - Backported security patch for control characters in protocol.
 - Use Composer\Pcre in Xls/Parser. Partial backport of [PR #4203](https://github.com/PHPOffice/PhpSpreadsheet/pull/4203)
 
-# 2025-01=11 - 2.3.6
+# 2025-01-11 - 2.3.6
 
 ### Deprecated