📝 Update release notes

[skip ci]

Author: github-actions[bot]

docs/en/docs/release-notes.md

@@ -15,6 +15,7 @@ hide:
 
 ### Internal
 
+* ✅ Add `httpx2` test dependency to avoid deprecation warning. PR [#15603](https://github.com/fastapi/fastapi/pull/15603) by [@YuriiMotov](https://github.com/YuriiMotov).
 * ⬆ Bump the python-packages group with 15 updates. PR [#15594](https://github.com/fastapi/fastapi/pull/15594) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * 👷 Configure Dependabot to group updates and update weekly. PR [#15560](https://github.com/fastapi/fastapi/pull/15560) by [@YuriiMotov](https://github.com/YuriiMotov).