changelog

Author: hanabi1224

CHANGELOG.md

@@ -14,9 +14,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Family::get_or_create_owned` can access a metric in a labeled family. This
    method avoids the risk of runtime deadlocks at the expense of creating an
    owned type. See [PR 244].
+
+- `impl<T: Collector> Collector for std::sync::Arc<T>`.
+   See [PR 273].
 
 [PR 244]: https://github.com/prometheus/client_rust/pull/244
 [PR 257]: https://github.com/prometheus/client_rust/pull/257
+[PR 273]: https://github.com/prometheus/client_rust/pull/273
 
 ### Changed