Managing timers and contexts in Go

It is necessary to analyze the provided code and eliminate possible issues related to resource leaks or unfinished timers.

func main() {
  ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)

  for i := 0; i < 10; i++ {
    go doRequest(ctx)
  }

  time.Sleep(time.Second)
  cancel()
  time.Sleep(time.Second * 2)
}

func doRequest(ctx context.Context) {
  select {
  case <-time.After(time.Second * 2):
    fmt.Println("timer timeout")
  case <-ctx.Done():
    fmt.Println("context cancelled")
  }
}