switched to new way

src/Poe2Trade.Core/Helpers.cs

@@ -0,0 +1,14 @@
+namespace Poe2Trade.Core;
+
+public static class Helpers
+{
+    private static readonly Random Rng = new();
+
+    public static Task Sleep(int ms) => Task.Delay(ms);
+
+    public static Task RandomDelay(int minMs, int maxMs)
+    {
+        var delay = Rng.Next(minMs, maxMs + 1);
+        return Task.Delay(delay);
+    }
+}