📝 Update release notes

[skip ci]

Author: github-actions[bot]

release-notes.md

@@ -4,6 +4,7 @@
 
 ### Internal
 
+* ✅ Migrate/add tests. PR [#7](https://github.com/fastapi/annotated-doc/pull/7) by [@tiangolo](https://github.com/tiangolo).
 * 👷 Add setup to run tests on CI. PR [#6](https://github.com/fastapi/annotated-doc/pull/6) by [@tiangolo](https://github.com/tiangolo).
 * 👷 Add templates and admin CI workflows. PR [#3](https://github.com/fastapi/annotated-doc/pull/3) by [@tiangolo](https://github.com/tiangolo).
 * 🔧 Add configs for `.github`. PR [#1](https://github.com/fastapi/annotated-doc/pull/1) by [@tiangolo](https://github.com/tiangolo).