docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1,4 +1,7 @@
 # Base64 to File
+<!-- 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 -->
 
 Use this action if you need to get a file from a base64-encoded string that you may be storing in Secrets or elsewhere.  This can be useful for certificate signing and storing the base64 cert in the Secrets.
 
@@ -29,3 +32,22 @@ The Action has an output variable named filePath that you can use as this file i
   with:
       filelocation: ${{ steps.write_file.outputs.filePath }}
 ```
+
+## 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/filipkowicz"><img src="https://avatars3.githubusercontent.com/u/4691550?v=4" width="100px;" alt=""/><br /><sub><b>Michał Filipek</b></sub></a><br /><a href="https://github.com/timheuer/base64-to-file/commits?author=filipkowicz" title="Documentation">📖</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-enable -->
+<!-- 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!