Adjusted CHANGELOG.md

Signed-off-by: Dmitry Volodin <volodin.d.v@gmail.com>

CHANGELOG.md

@@ -7,7 +7,7 @@
 - Add 'user_folder_for_python' behavior to switch writing python model notebooks to the user's folder ([835](https://github.com/databricks/dbt-databricks/pull/835))
 - Merge capabilities are extended ([739](https://github.com/databricks/dbt-databricks/pull/739)) to include the support for the following features (thanks @mi-volodin):
   - `with schema evolution` clause (requires Databricks Runtime 15.2 or above);
-  - `when not matched by source` clause, only for `delete` action
+  - `when not matched by source` clause allows both `delete` and `update set ...` with explicit action list.
   - `matched`, `not matched` and `not matched by source` condition clauses;
   - custom aliases for source and target tables can be specified and used in condition clauses;
   - `matched` and `not matched` steps can now be skipped;