📝 Update release notes

release-notes.md

@@ -61,6 +61,7 @@
 
 ### Refactors
 
+* ♻️ Refactor email logic to allow re-using util functions for testing and development. PR [#663](https://github.com/tiangolo/full-stack-fastapi-postgresql/pull/663) by [@tiangolo](https://github.com/tiangolo).
 * 💬 Improve Delete Account description and confirmation. PR [#661](https://github.com/tiangolo/full-stack-fastapi-postgresql/pull/661) by [@alejsdev](https://github.com/alejsdev).
 * ♻️ Refactor email templates. PR [#659](https://github.com/tiangolo/full-stack-fastapi-postgresql/pull/659) by [@alejsdev](https://github.com/alejsdev).
 * 📝 Update deployment files and docs. PR [#660](https://github.com/tiangolo/full-stack-fastapi-postgresql/pull/660) by [@tiangolo](https://github.com/tiangolo).