Fix changelog

Signed-off-by: Xabier Larrakoetxea <me@slok.dev>

Author: slok

CHANGELOG.md

@@ -85,7 +85,8 @@ Breaking change: The library has been refactored to be more flexible when adding
 - HTTP latency requests.
 - Prometheus recorder.
 
-[unreleased]: https://github.com/slok/go-http-metrics/compare/v0.6.1...HEAD
+[unreleased]: https://github.com/slok/go-http-metrics/compare/v0.7.0...HEAD
+[0.7.0]: https://github.com/slok/go-http-metrics/compare/v0.6.1...v0.7.0
 [0.6.1]: https://github.com/slok/go-http-metrics/compare/v0.6.0...v0.6.1
 [0.6.0]: https://github.com/slok/go-http-metrics/compare/v0.5.0...v0.6.0
 [0.5.0]: https://github.com/slok/go-http-metrics/compare/v0.4.0...v0.5.0