docs: Add codeclimate badge

README.md

@@ -1,11 +1,13 @@
 [![license](https://img.shields.io/github/license/peaceiris/actions-hugo.svg)](https://github.com/peaceiris/actions-hugo/blob/master/LICENSE)
 [![release](https://img.shields.io/github/release/peaceiris/actions-hugo.svg)](https://github.com/peaceiris/actions-hugo/releases/latest)
 [![GitHub release date](https://img.shields.io/github/release-date/peaceiris/actions-hugo.svg)](https://github.com/peaceiris/actions-hugo/releases)
+[![Release Feed](https://img.shields.io/badge/release-feed-yellow)](https://github.com/peaceiris/actions-hugo/releases.atom)
 ![Test](https://github.com/peaceiris/actions-hugo/workflows/Test/badge.svg?branch=master&event=push)
+[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=peaceiris/actions-hugo)](https://dependabot.com)
+
 [![CodeFactor](https://www.codefactor.io/repository/github/peaceiris/actions-hugo/badge)](https://www.codefactor.io/repository/github/peaceiris/actions-hugo)
 [![codecov](https://codecov.io/gh/peaceiris/actions-hugo/branch/master/graph/badge.svg)](https://codecov.io/gh/peaceiris/actions-hugo)
-[![Release Feed](https://img.shields.io/badge/release-feed-yellow)](https://github.com/peaceiris/actions-hugo/releases.atom)
-[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=peaceiris/actions-hugo)](https://dependabot.com)
+[![Maintainability](https://api.codeclimate.com/v1/badges/ebf2eef3a046b396ba9c/maintainability)](https://codeclimate.com/github/peaceiris/actions-hugo/maintainability)
 
 <img width="400" alt="GitHub Actions for Hugo" src="./images/ogp.svg">