HideFromIl2Cpp and slight modification to TimedModifier to use new HudString method

MiraAPI.Example/Roles/FreezerRole.cs

@@ -1,4 +1,5 @@
-using MiraAPI.Roles;
+using Il2CppInterop.Runtime.Attributes;
+using MiraAPI.Roles;
 using MiraAPI.Utilities.Assets;
 using UnityEngine;
 
@@ -12,6 +13,7 @@ public class FreezerRole : ImpostorRole, ICustomRole
     public string RoleDescription => RoleLongDescription;
     public Color RoleColor => Palette.Blue;
     public ModdedRoleTeams Team => ModdedRoleTeams.Impostor;
+    [HideFromIl2Cpp]
     public LoadableAsset<Sprite> OptionsScreenshot => ExampleAssets.Banner;
     public int MaxPlayers => 2;
 }