Update README.md

README.md

@@ -3,6 +3,10 @@
 [![Update release version.](https://github.com/tj-actions/auto-doc/workflows/Update%20release%20version./badge.svg)](https://github.com/tj-actions/auto-doc/actions?query=workflow%3A%22Update+release+version.%22)
 [![Public workflows that use this action.](https://img.shields.io/endpoint?url=https%3A%2F%2Fapi-tj-actions1.vercel.app%2Fapi%2Fgithub-actions%2Fused-by%3Faction%3Dtj-actions%2Fauto-doc%26badge%3Dtrue)](https://github.com/search?o=desc\&q=tj-actions+auto-doc+language%3AYAML\&s=\&type=Code)
 
+[![Ubuntu](https://img.shields.io/badge/Ubuntu-E95420?logo=ubuntu\&logoColor=white)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+[![Mac OS](https://img.shields.io/badge/mac%20os-000000?logo=macos\&logoColor=F0F0F0)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+[![Windows](https://img.shields.io/badge/Windows-0078D6?logo=windows\&logoColor=white)](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+
 ## auto-doc
 
 Auto generate documentation from actions.yml like [this](#inputs) by simply adding `Inputs` and/or `Outputs` [`H2` header](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet#headers) to your `README.md`.