📝 Update release notes

release-notes.md

@@ -6,6 +6,7 @@
 
 ### Refactors
 
+* 🎨 Replace buttons styling for variants for consistency. PR [#722](https://github.com/tiangolo/full-stack-fastapi-template/pull/722) by [@alejsdev](https://github.com/alejsdev).
 * 🛠️ Improve `modify-openapi-operationids.js`. PR [#720](https://github.com/tiangolo/full-stack-fastapi-template/pull/720) by [@alejsdev](https://github.com/alejsdev).
 * ♻️ Replace pytest-mock with unittest.mock and remove pytest-cov. PR [#717](https://github.com/tiangolo/full-stack-fastapi-template/pull/717) by [@estebanx64](https://github.com/estebanx64).
 * 🛠️ Minor changes in frontend. PR [#715](https://github.com/tiangolo/full-stack-fastapi-template/pull/715) by [@alejsdev](https://github.com/alejsdev).