Typo in control_event_hs_descriptor_content() comment

In this code:

/** Send HS_DESC_CONTENT event after completion of a successful fetch from hs
 * directory. If <b>hsdir_id_digest</b> is NULL, it is replaced by "UNKNOWN".
 * If <b>content</b> is NULL, it is replaced by an empty string. The
 * <b>onion_address</b> or <b>desc_id</b> set to NULL will no trigger the
 * control event. */

The no trigger should be not trigger.

I will post a PR shortly.