docs: update README.md [skip ci]

README.md

@@ -1,4 +1,7 @@
 ## branch-names
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 [![CI](https://github.com/tj-actions/branch-names/workflows/CI/badge.svg)](https://github.com/tj-actions/branch-names/actions?query=workflow%3ACI) [![Update release version.](https://github.com/tj-actions/branch-names/actions/workflows/sync-release-version.yml/badge.svg)](https://github.com/tj-actions/branch-names/actions/workflows/sync-release-version.yml) [![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%2Fbranch-names%26badge%3Dtrue)](https://github.com/search?o=desc\&q=tj-actions+branch-names+language%3AYAML\&s=\&type=Code) [![Codacy Badge](https://app.codacy.com/project/badge/Grade/5862d212695f44cbb0c4c031bf39f56f)](https://www.codacy.com/gh/tj-actions/branch-names/dashboard?utm_source=github.com\&utm_medium=referral\&utm_content=tj-actions/branch-names\&utm_campaign=Badge_Grade)
 
@@ -216,3 +219,23 @@ If you are reporting a bug, please include:
 *   Your operating system name and version.
 *   Any details about your workflow that might be helpful in troubleshooting.
 *   Detailed steps to reproduce the bug.
+
+## Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://github.com/loarca"><img src="https://avatars.githubusercontent.com/u/22898638?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Alejandro Loarca</b></sub></a><br /><a href="https://github.com/tj-actions/branch-names/commits?author=loarca" title="Code">💻</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!