Adding hyphen to command-line arguments

Co-authored-by: Amy Reeve <amy.reeve@unity3d.com>

Author: noellie-velez

com.unity.netcode.gameobjects/Documentation~/command-line-arguments.md

@@ -59,7 +59,7 @@ If you want to ignore the connection port provided through command-line argument
 UnityTransport.SetConnectionData(string ip, ushort port, string listenAddress, bool forceOverride);
 ```
 
-Setting `forceOverride` to `true` ensures that the values you pass to `SetConnectionData` override any values specified via command line arguments.
+Setting `forceOverride` to `true` ensures that the values you pass to `SetConnectionData` override any values specified via command-line arguments.
 
 ## Additional resources