docs: comment out unimplemented speed parameter in API docs

templates/index.html

@@ -202,13 +202,13 @@ Hello! I am Pocket TTS, running locally on your machine. I can clone voices and
 									<td><code>true</code></td>
 									<td>Enable streaming response for real-time playback</td>
 								</tr>
-								<tr>
+								<!-- <tr>
 									<td><code>speed</code></td>
 									<td>number</td>
 									<td></td>
 									<td><code>1.0</code></td>
 									<td>Playback speed (0.25 to 4.0)</td>
-								</tr>
+								</tr> -->
 							</tbody>
 						</table>
 					</div>