fix: ux: specify arg in net ping cmd

Specify that you need to ping the `peerMultiaddrs` with the `lotus net ping` and `lotus-miner net ping`.

cli/net.go

@@ -124,8 +124,9 @@ var NetPeers = &cli.Command{
 }
 
 var NetPing = &cli.Command{
-	Name:  "ping",
-	Usage: "Ping peers",
+	Name:      "ping",
+	Usage:     "Ping peers",
+	ArgsUsage: "[peerMultiaddr]",
 	Flags: []cli.Flag{
 		&cli.IntFlag{
 			Name:    "count",

documentation/en/cli-lotus-miner.md

@@ -1241,7 +1241,7 @@ NAME:
    lotus-miner net ping - Ping peers
 
 USAGE:
-   lotus-miner net ping [command options] [arguments...]
+   lotus-miner net ping [command options] [peerMultiaddr]
 
 OPTIONS:
    --count value, -c value     specify the number of times it should ping (default: 10)

documentation/en/cli-lotus.md

@@ -2542,7 +2542,7 @@ NAME:
    lotus net ping - Ping peers
 
 USAGE:
-   lotus net ping [command options] [arguments...]
+   lotus net ping [command options] [peerMultiaddr]
 
 OPTIONS:
    --count value, -c value     specify the number of times it should ping (default: 10)