docs: update CONTRIBUTORS.md

Author: allcontributors[bot]

CONTRIBUTORS.md

@@ -3,6 +3,13 @@
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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+<table>
+  <tbody>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="http://davidwilby.dev"><img src="https://avatars.githubusercontent.com/u/24752124?v=4?s=100" width="100px;" alt="David Wilby"/><br /><sub><b>David Wilby</b></sub></a><br /><a href="#ideas-davidwilby" title="Ideas, Planning, & Feedback">🤔</a> <a href="#code-davidwilby" title="Code">💻</a> <a href="#content-davidwilby" title="Content">🖋</a> <a href="#maintenance-davidwilby" title="Maintenance">🚧</a></td>
+    </tr>
+  </tbody>
+</table>
 
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