fixes: correct text displayed for how to use haystack command

Signed-off-by: deadprogram <[email protected]>

Author: deadprogram

README.md

@@ -119,7 +119,7 @@ The keys will be saved in a file named `DEVICENAME.keys` and the configuration f
 For example:
 
 ```shell
-haystack flash nano-rp2040 DEVICENAME
+haystack flash DEVICENAME nano-rp2040
 ```
 
 This will use TinyGo to compile the firmware using your keys, and then flash it to the device. See [https://tinygo.org/getting-started/overview/](https://tinygo.org/getting-started/overview/) for more information about TinyGo.

cmd/haystack/main.go

@@ -16,7 +16,7 @@ func main() {
 
 	args := flag.Args()
 	if len(args) < 1 {
-		fmt.Println("either 'keys' 'flash' or 'scan' subcommand is required.", len(args))
+		fmt.Println("subcommand required. valid subcommands are 'keys' 'flash' 'scan'")
 		return
 	}
 
@@ -31,7 +31,7 @@ func main() {
 		}
 	case "flash":
 		if len(args) < 3 {
-			fmt.Println("Please provide a device target and name")
+			fmt.Println("Please provide a device name and target")
 			return
 		}
 		if err := flashDevice(args[1], args[2], verboseFlag); err != nil {
@@ -42,7 +42,7 @@ func main() {
 			fmt.Println("failed to scan devices:", err)
 		}
 	default:
-		fmt.Println("either 'keys' or 'flash' subcommand is required.")
+		fmt.Println("subcommand required. valid subcommands are 'keys' 'flash' 'scan'")
 		return
 	}
 }