docs: add change log for add dispose method in database_tracker

Author: suojae

drift/CHANGELOG.md

@@ -7,6 +7,7 @@
   JSON.
 - Add `runWithInterceptor` method to databases to only apply interceptors in
   a restricted block.
+- Add `dispose()` method to `DatabaseTracker` to explicitly release in-memory SQLite resources.
 
 ## 2.23.1