chore: update changelog

CHANGELOG.md

@@ -5,6 +5,13 @@ 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).
 
+## [4.1.0] - 2024-05-16
+
+### Added
+
+- A generic `get-gcp-secrets` fragment to retrieve one or more Google Secret
+  Manager secrets in a CI job.
+
 ## [4.0.0] - 2024-04-05
 
 ### Changed