Add PR to changelog

Author: jeffgbutler

CHANGELOG.md

@@ -44,7 +44,8 @@ The pull request for this change is ([#550](https://github.com/mybatis/mybatis-d
 2. Deprecated Kotlin DSL functions have been removed, as well as deprecated support for "EmptyListCallback" in the "in"
    conditions. ([#548](https://github.com/mybatis/mybatis-dynamic-sql/pull/548))
 3. Refactored the common insert mapper support for MyBatis3 by adding a CommonGeneralInsertMapper that can be used
-   without a class that matches the table row. It includes methods for general insert and insert select. 
+   without a class that matches the table row. It includes methods for general insert and insert select.
+   ([#570](https://github.com/mybatis/mybatis-dynamic-sql/pull/570))