update changelog

Author: tobz

metrics-exporter-dogstatsd/CHANGELOG.md

@@ -8,6 +8,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased] - ReleaseDate
 
+### Fixed
+
+- The internal forwarder state was left in an inconsistent state after a connection failure was encountered.
+  ([#563](https://githib.com/metrics-rs/metrics/pull/563))
+
+### Added
+
+- Added support for configuring global labels, as well as prefix.
+  ([#555](https://githib.com/metrics-rs/metrics/pull/555))
+
 ## [0.9.0] - 2025-01-19
 
 ### Added