📝 Update release notes

Author: github-actions

README.md

@@ -678,6 +678,7 @@ All the image tags, configurations, environment variables and application option
 
 ### Latest Changes
 
+* ⬆️ Bump gunicorn from 20.1.0 to 21.2.0. PR [#185](https://github.com/tiangolo/uvicorn-gunicorn-docker/pull/185) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * ⬆️ Bump actions/checkout from 3.3.0 to 4.1.0. PR [#189](https://github.com/tiangolo/uvicorn-gunicorn-docker/pull/189) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * 🔥 Remove Alpine support. PR [#193](https://github.com/tiangolo/uvicorn-gunicorn-docker/pull/193) by [@tiangolo](https://github.com/tiangolo).
 * ⬆️ Bump uvicorn[standard] from 0.20.0 to 0.21.0. PR [#174](https://github.com/tiangolo/uvicorn-gunicorn-docker/pull/174) by [@dependabot[bot]](https://github.com/apps/dependabot).