Update changelog

CHANGELOG.md

@@ -62,6 +62,7 @@
   Querier [`GET /querier/api/traces/<traceid>`](https://grafana.com/docs/tempo/latest/api_docs/#query) response's body has been modified 
   to return `tempopb.TraceByIDResponse` instead of simply `tempopb.Trace`. This will cause a disruption of the read path during rollout of the change.
 * [ENHANCEMENT] Add `search_default_limit` to querier config. [#1022](https://github.com/grafana/tempo/pull/1022) (@kvrhdn)
+* [ENHANCEMENT] Add new metric `tempo_distributor_push_duration_seconds` [#1027](https://github.com/grafana/tempo/pull/1027) (@zalegrala)
 * [BUGFIX] Update port spec for GCS docker-compose example [#869](https://github.com/grafana/tempo/pull/869) (@zalegrala)
 * [BUGFIX] Fix "magic number" errors and other block mishandling when an ingester forcefully shuts down [#937](https://github.com/grafana/tempo/issues/937) (@mdisibio)
 * [BUGFIX] Fix compactor memory leak [#806](https://github.com/grafana/tempo/pull/806) (@mdisibio)