ALSA: seq: ump: Fix -Wformat-truncation warning

The filling of a port name string got a warning with W=1 due to the
potentially too long group name.  Add the string precision to limit
the size.

Fixes: 81fd444a ("ALSA: seq: Bind UMP device")
Link: https://lore.kernel.org/r/20230915082802.28684-2-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/seq/seq_ump_client.c

@@ -207,7 +207,7 @@ static void fill_port_info(struct snd_seq_port_info *port,
 		SNDRV_SEQ_PORT_TYPE_PORT;
 	port->midi_channels = 16;
 	if (*group->name)
-		snprintf(port->name, sizeof(port->name), "Group %d (%s)",
+		snprintf(port->name, sizeof(port->name), "Group %d (%.53s)",
 			 group->group + 1, group->name);
 	else
 		sprintf(port->name, "Group %d", group->group + 1);