update changelog

Author: newpavlov

sponge-cursor/CHANGELOG.md

@@ -5,4 +5,6 @@ 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)
-- Initial release.
+- Initial release ([#1477])
+
+[#1477]: https://github.com/RustCrypto/utils/pull/1477