fix npe on Configure RGB.NET devices

Author: Aytackydln

Project-Aurora/Project-Aurora/Devices/RGBNet/Config/DeviceMappingConfig.cs

@@ -13,7 +13,7 @@ public class DeviceMappingConfig
     public static DeviceMappingConfig Config => _configLoader.Value;
 
     [JsonIgnore]
-    private static string _configPath = Path.Combine(Global.AppDataDirectory, "AsusDevices.json");
+    private static string _configPath = Path.Combine(Global.AppDataDirectory, "DeviceMappings.json");
 
     [JsonProperty(PropertyName = "d")]
     public List<RgbNetConfigDevice> Devices { get; set; } = new();

Project-Aurora/Project-Aurora/Devices/RGBNet/Config/RgbNetConfigDevice.cs

@@ -14,7 +14,7 @@ public partial class RgbNetConfigDevice
     public string Name { get; init; }
 
     [JsonProperty(PropertyName = "k")]
-    public Dictionary<LedId, DeviceKeys> KeyMapper { get; init; }
+    public Dictionary<LedId, DeviceKeys> KeyMapper { get; } = new();
 
     public RgbNetConfigDevice(IRGBDevice device)
     {