fix flaky outgoing streams map test (quic-go#4283)

streams_map_outgoing_test.go

@@ -33,7 +33,7 @@ var _ = Describe("Streams Map (outgoing)", func() {
  m.mutex.Lock()
  defer m.mutex.Unlock()
  return len(m.openQueue)
- }, 50*time.Millisecond, 100*time.Microsecond).Should(Equal(n))
+ }, scaleDuration(100*time.Millisecond), scaleDuration(10*time.Microsecond)).Should(Equal(n))
  }
 
  BeforeEach(func() {