Modify help information of virsh list command

Use 'virsh list domain --title' option can get domain's title,
not description, the original help information 'show short
domain description' will confuse users, so modify it to
'show domain title'
Signed-off-by: NLi Yang <liyang.fnst@cn.fujitsu.com>

tools/virsh-domain-monitor.c

@@ -1718,7 +1718,7 @@ static const vshCmdOptDef opts_list[] = {
     },
     {.name = "title",
      .type = VSH_OT_BOOL,
-     .help = N_("show short domain description")
+     .help = N_("show domain title")
     },
     {.name = NULL}
 };