Fix whitelistadd requiring server restart

Content.Server/Whitelist/WhitelistCommands.cs

@@ -45,7 +45,7 @@ public async void Execute(IConsoleShell shell, string argStr, string[] args)
             if (player.TryGetPlayerDataByUsername(name, out var playerData) &&
                 player.TryGetSessionByUsername(name, out var session))
             {
-                playerData.ContentData()!.Whitelisted = false;
+                playerData.ContentData()!.Whitelisted = true;
                 playtime.SendWhitelistCached(session);
             }