chore: bump version 6.15.1

Signed-off-by: Martin Chodur <[email protected]>

Author: FUSAKLA

CHANGELOG.md

@@ -5,6 +5,11 @@ 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).
 
 ## Unreleased
+
+## [v6.15.1] 2024-11-06
+### Added
+- [#116](https://github.com/seznam/slo-exporter/pull/116) Add `make test-release` to test the release process and run it on the default branch.
+### Fixed
 - [#115](https://github.com/seznam/slo-exporter/pull/115) Add `qemu` before release to fix the multi-platform release issue.
 
 ## [v6.15.0] 2024-11-06