Add note to query log that pi.hole queries are not logged (#1913)

* Add note to query log that pi.hole is never logged

Signed-off-by: yubiuser <ckoenig@posteo.de>

queries.php

@@ -158,6 +158,7 @@ if(strlen($showing) > 0)
                     </tr>
                 </tfoot>
             </table>
+            <p>Note: Queries for <code>pi.hole</code> and the hostname are never logged.</p>
             <p><strong>Filtering options:</strong></p>
             <ul>
                 <li>Click a value in a column to add/remove that value to/from the filter</li>