Fix for unknown method description typo (#1611)

Author: jboutsicaris

index.html

@@ -1316,7 +1316,7 @@ <h3>Errors</h3>
   <td>405
   <td><code>unknown method</code>
   <td>The requested <a>command</a> matched a known URL
-   but did not match an method for that URL.
+   but did not match any method for that URL.
  </tr>
 
  <tr>