Add delay before yielding in ForwardTimeAsync to prevent timer issues

Author: TheAngryByrd

tests/IcedTasks.Tests/Expect.fs

@@ -156,8 +156,10 @@ type ManualTimeProviderExtensions =
             do! Task.Yield()
             this.Advance(time)
             //https://github.com/dotnet/runtime/issues/85326
-            // I'm not sure why we have to do this many yields, but sometimes the timer doesn't fire and the test run forever.
+            // I'm not sure why we have to do this many yields or delays, but sometimes the timer doesn't fire and the test run forever.
             // I've spent way too much time on this already.
+            do! Task.Delay(150)
+
             do!
                 Task.yieldMany (
                     Int32.MaxValue