Changelog.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

CHANGELOG.md

@@ -10,7 +10,7 @@ NOTE: As semantic versioning states all 0.y.z releases can contain breaking chan
 
 We use _breaking :warning:_ to mark changes that are not backward compatible (relates only to v0.y.z releases.)
 
-## [v0.19.0-rc.1](https://github.com/thanos-io/thanos/releases/tag/v0.19.0-rc.1) - 2021.03.09
+## [v0.19.0-rc.1](https://github.com/thanos-io/thanos/releases/tag/v0.19.0-rc.2) - 2021.03.22
 
 ### Added
 
@@ -36,6 +36,7 @@ We use _breaking :warning:_ to mark changes that are not backward compatible (re
 - [#3815](https://github.com/thanos-io/thanos/pull/3815) Receive: Improve handling of empty time series from clients
 - [#3795](https://github.com/thanos-io/thanos/pull/3795) s3: A truncated "get object" response is reported as error.
 - [#3899](https://github.com/thanos-io/thanos/pull/3899) Receive: Correct the inference of client gRPC configuration.
+- [#3943](https://github.com/thanos-io/thanos/pull/3943): Receive: Fixed memory regression introduced in v0.17.0.
 
 ### Changed