Add changelog entry

CHANGELOG.md

@@ -1,10 +1,13 @@
 ## dbt-spark 1.0.0 (Release TBD)
 
+### Under the hood
+- Refactor seed macros: remove duplicated code from dbt-core, and provide clearer logging of SQL parameters that differ by connection method ([#249](https:/dbt-labs/dbt-spark/issues/249), [#250](https:/dbt-labs/dbt-snowflake/pull/250))
+
 ## dbt-spark 1.0.0rc1 (November 10, 2021)
 
 ### Under the hood
-
 - Remove official support for python 3.6, which is reaching end of life on December 23, 2021 ([dbt-core#4134](https:/dbt-labs/dbt-core/issues/4134), [#253](https:/dbt-labs/dbt-snowflake/pull/253))
+- Add support for structured logging [#251](https:/dbt-labs/dbt-spark/pull/251)
 
 ### Under the hood
 - Add support for structured logging [#251](https:/dbt-labs/dbt-spark/pull/251)