📝 Update release notes

docs/en/docs/release-notes.md

@@ -2,6 +2,7 @@
 
 ## Latest Changes
 
+* 🔨 Enable linenums in MkDocs Material during local live development to simplify highlighting code. PR [#9769](https://github.com/tiangolo/fastapi/pull/9769) by [@tiangolo](https://github.com/tiangolo).
 * ✨ Add support for `deque` objects and children in `jsonable_encoder`. PR [#9433](https://github.com/tiangolo/fastapi/pull/9433) by [@cranium](https://github.com/cranium).
 * ⬆ Update httpx requirement from <0.24.0,>=0.23.0 to >=0.23.0,<0.25.0. PR [#9724](https://github.com/tiangolo/fastapi/pull/9724) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * ⬆ Bump mkdocs-material from 9.1.16 to 9.1.17. PR [#9746](https://github.com/tiangolo/fastapi/pull/9746) by [@dependabot[bot]](https://github.com/apps/dependabot).