chore: improve changelog notes for v0.2.1

Author: eddietejeda

CHANGELOG.md

@@ -10,9 +10,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.2.1] - 2026-05-24
 
-### Changed
+### Added
 
-- Release 0.2.1
+- `execute_sql` accepts an optional `database` keyword argument. When provided, the database name is resolved to an ID and sent as the `X-Database-Id` header so SQL can reference managed database tables as `"default"."<schema>"."<table>"`. Behaviour is unchanged when `database` is omitted.
 
 ## [0.2.0] - 2026-05-24