Add a changelog entry

Author: ptodev

CHANGELOG.md

@@ -45,6 +45,9 @@ Main (unreleased)
 
 - Reduced resource overhead of `prometheus.scrape`, `prometheus.relabel`, `prometheus.enrich`, and `prometheus.remote_write` by removing unnecessary usage of labelstore.LabelStore. (@kgeckhart)
 
+- `prometheus.remote_write` now sends metadata if it is configured for Remote Write v2 
+  and if `prometheus.scrape` is configured with `honor_metadata = true`. (@ptodev, @kgeckhart)
+
 ### Bugfixes
 
 - (_Public Preview_) Additions to `database_observability.postgres` component: