* ✨ Update `ORJSONResponse` to support non `str` keys and serializing Numpy arrays. PR [#3892](https://github.com/tiangolo/fastapi/pull/3892) by [@baby5](https://github.com/baby5).
* 🔧 Update sponsors, disable ImgWhale. PR [#5338](https://github.com/tiangolo/fastapi/pull/5338) by [@tiangolo](https://github.com/tiangolo).
* 📝 Update docs for `ORJSONResponse` with details about improving performance. PR [#2615](https://github.com/tiangolo/fastapi/pull/2615) by [@falkben](https://github.com/falkben).
* 📝 Add docs for creating a custom Response class. PR [#5331](https://github.com/tiangolo/fastapi/pull/5331) by [@tiangolo](https://github.com/tiangolo).