📝 Update release notes

[skip ci]

Author: github-actions[bot]

release-notes.md

@@ -9,6 +9,7 @@
 
 ### Internal
 
+* 👷 Automate release preparation. PR [#420](https://github.com/fastapi/fastapi-cli/pull/420) by [@tiangolo](https://github.com/tiangolo).
 * 🔥 Remove old package stub slim, not user nor needed. PR [#419](https://github.com/fastapi/fastapi-cli/pull/419) by [@tiangolo](https://github.com/tiangolo).
 * ⬆ Bump zizmorcore/zizmor-action from 0.5.3 to 0.5.6. PR [#414](https://github.com/fastapi/fastapi-cli/pull/414) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * 👷 Configure Dependabot to group updates and update weekly. PR [#407](https://github.com/fastapi/fastapi-cli/pull/407) by [@YuriiMotov](https://github.com/YuriiMotov).