Go context.Done() question

main.go

package main

import (
  "context"
  "time"
)

func main() {
  ctx, ctxCancel := context.WithCancel(context.Background())
  
  go func() {
    // PLACE 1
    <-ctx.Done()
  }()
  
  go func() {
    time.Sleep(1000 * time.Millisecond)
    ctxCancel()
  }()
  
  // PLACE 2
  <-ctx.Done()
}