📝 Update release notes

docs/release-notes.md

@@ -1,5 +1,7 @@
 ## Next release
 
+* Fix bug: handling additional `responses` in `APIRouter.include_router()`. PR <a href="https://github.com/tiangolo/fastapi/pull/140" target="_blank">#140</a>.
+
 * Fix typo in SQL tutorial. PR <a href="https://github.com/tiangolo/fastapi/pull/138" target="_blank">#138</a> by <a href="https://github.com/mostaphaRoudsari" target="_blank">@mostaphaRoudsari</a>.
 
 * Fix typos in section about nested models and OAuth2 with JWT. PR <a href="https://github.com/tiangolo/fastapi/pull/127" target="_blank">#127</a> by <a href="https://github.com/mmcloud" target="_blank">@mmcloud</a>.