docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -124,7 +124,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
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-    <td align="center"><a href="https://github.com/jonah-butler"><img src="https://avatars.githubusercontent.com/u/18040568?v=4?s=100" width="100px;" alt=""/><br /><sub><b>jonah-butler</b></sub></a><br /><a href="https://github.com/mcnaveen/Random-Words-API/commits?author=jonah-butler" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/jonah-butler"><img src="https://avatars.githubusercontent.com/u/18040568?v=4?s=100" width="100px;" alt=""/><br /><sub><b>jonah-butler</b></sub></a><br /><a href="https://github.com/mcnaveen/Random-Words-API/commits?author=jonah-butler" title="Code">💻</a> <a href="https://github.com/mcnaveen/Random-Words-API/commits?author=jonah-butler" title="Documentation">📖</a></td>
   </tr>
 </table>