📝 Update release notes

[skip ci]

docs/en/docs/release-notes.md

@@ -33,6 +33,10 @@ hide:
 * ✅ Simplify tests for background_tasks. PR [#13166](https://github.com/fastapi/fastapi/pull/13166) by [@alejsdev](https://github.com/alejsdev).
 * ✅ Simplify tests for additional_status_codes. PR [#13149](https://github.com/fastapi/fastapi/pull/13149) by [@tiangolo](https://github.com/tiangolo).
 
+### Upgrades
+
+* ⬆️ Upgrade `jinja2` to >=3.1.5. PR [#13194](https://github.com/fastapi/fastapi/pull/13194) by [@DanielKusyDev](https://github.com/DanielKusyDev).
+
 ### Docs
 
 * ✏️ Update Strawberry integration docs. PR [#13155](https://github.com/fastapi/fastapi/pull/13155) by [@kinuax](https://github.com/kinuax).