input: Write a function to implement a positive feedback loop for the given Python program that prints "hello" 10 times. The loop should increment the index and print a congratulatory message when the index reaches 10. The function should return the modified nested loop.
  
  def positive_feedback_loop():
      for i in range(10):
          print("hello")
          i += 1
          if i == 10:
              print("You've got it!")
      return
  
  assert positive_feedback_loop() is None
output: def positive_feedback_loop():
      for i in range(10):
          print("hello")
          if i == 9:
              print("You've got it!")
      return