input: Write a python function to replace the word 'quick' with 'QUICK' in a given text.
  assert replace_quick("The quick brown fox jumps over the lazy dog") == "The QUICK brown fox jumps over the lazy dog"
  assert replace_quick("A quick movement of the enemy will jeopardize six gunboats.") == "A QUICK movement of the enemy will jeopardize six gunboats."
  assert replace_quick("Quick brown fox.") == "QUICK brown fox."
output: def replace_quick(text):
      return text.replace('quick', 'QUICK')