update readme

Author: GilbN

README.md

@@ -295,6 +295,12 @@
 <p><a href="https://docs.theme-park.dev/themes/thelounge">The Lounge (Deprecated)</a></p>
 </td>
 </tr>
+<tr>
+<td>
+<p><a href="https://docs.theme-park.dev/themes/audiobookshelf"><img src="https://docs.theme-park.dev/site_assets/audiobookshelf/logo.png" alt="" width="48" height="48" /></a></p>
+<p><a href="https://docs.theme-park.dev/themes/audiobookshelf">The Lounge (Deprecated)</a></p>
+</td>
+</tr>
 </tbody>
 </table>
 </div>