Fix v0.2.5 release date (rust-random#250)

Author: newpavlov

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.2.5] - 2022-02-08
+## [0.2.5] - 2022-02-22
 ### Added
 - ESP-IDF targets (`*‑espidf`) support [#245]