set release date

Author: newpavlov

sponge-cursor/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](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## 0.1.0 (UNRELEASED)
+## 0.1.0 (2026-05-08)
 - Initial release ([#1477])
 
 [#1477]: https://github.com/RustCrypto/utils/pull/1477