Fixed some typos, courtesy of codespell

Main change is the conversion from the British cancelling/-ed to the
American canceling/-ed.

src/libstrongswan/plugins/pkcs11/pkcs11_manager.c

@@ -173,7 +173,7 @@ CALLBACK(dispatch_slot_events, job_requeue_t,
 	rv = entry->lib->f->C_WaitForSlotEvent(0, &slot, NULL);
 	if (rv == CKR_FUNCTION_NOT_SUPPORTED || rv == CKR_NO_EVENT)
 	{
-		DBG1(DBG_CFG, "module '%s' does not support hot-plugging, cancelled",
+		DBG1(DBG_CFG, "module '%s' does not support hot-plugging, canceled",
 			 entry->lib->get_name(entry->lib));
 		return JOB_REQUEUE_NONE;
 	}