docs: update README.md

Author: allcontributors[bot]

README.md

@@ -1,6 +1,6 @@
 # std
 
-[![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-4-orange.svg?style=flat-square)](#contributors)
 
 ## Contributors ✨
 
@@ -13,6 +13,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://github.com/sandstreamdevelopment"><img src="https://avatars2.githubusercontent.com/u/44231396?v=4" width="100px;" alt="sandstreamdevelopment"/><br /><sub><b>sandstreamdevelopment</b></sub></a><br /><a href="#business-sandstreamdevelopment" title="Business development">💼</a> <a href="#financial-sandstreamdevelopment" title="Financial">💵</a> <a href="#ideas-sandstreamdevelopment" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://github.com/przemyslawzalewski"><img src="https://avatars0.githubusercontent.com/u/30114244?v=4" width="100px;" alt="Przemysław Zalewski"/><br /><sub><b>Przemysław Zalewski</b></sub></a><br /><a href="https://github.com/sandstreamdev/std/commits?author=przemyslawzalewski" title="Code">💻</a> <a href="#ideas-przemyslawzalewski" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://github.com/jakubbogacz"><img src="https://avatars3.githubusercontent.com/u/26272028?v=4" width="100px;" alt="jakubbogacz"/><br /><sub><b>jakubbogacz</b></sub></a><br /><a href="#ideas-jakubbogacz" title="Ideas, Planning, & Feedback">🤔</a> <a href="#review-jakubbogacz" title="Reviewed Pull Requests">👀</a></td>
+    <td align="center"><a href="https://github.com/marekrozmus"><img src="https://avatars3.githubusercontent.com/u/26272040?v=4" width="100px;" alt="Marek Rozmus"/><br /><sub><b>Marek Rozmus</b></sub></a><br /><a href="#review-marekrozmus" title="Reviewed Pull Requests">👀</a></td>
   </tr>
 </table>