Adding hyphen to command-line arguments + rewording

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

Author: noellie-velez

com.unity.netcode.gameobjects/Documentation~/configuration.md

@@ -8,4 +8,4 @@ Configure your Netcode for GameObjects project.
 | **[Configuring connections](configure-connections.md)** | Configure connections in your project.                                                                            |
 | **[Transports](advanced-topics/transports.md)**         | Transport layers establish communication between your application and different hosts in a network.               |
 | **[Unity Relay](relay/relay.md)**                       | Use Unity Relay with Netcode for GameObjects to connect clients and hosts over the internet using a relay server. |
-| **[Command line arguments](command-line-arguments.md)** | Use command line arguments.                                                                                       |
+| **[Command-line arguments](command-line-arguments.md)** | Use command-line arguments to configure certain aspects of your game at launch.                                                                              |