input: Write a python function to sort a list of records by the third element in descending order using a lambda function.
  assert sort_records([['apple', 'Washington', 400], ['banana', 'California', 800], ['cherry', 'Texas', 300]]) == [['banana', 'California', 800], ['apple', 'Washington', 400], ['cherry', 'Texas', 300]]
  assert sort_records([['mango', 'Florida', 500], ['grape', 'New York', 200], ['peach', 'Georgia', 600]]) == [['peach', 'Georgia', 600], ['mango', 'Florida', 500], ['grape', 'New York', 200]]
  assert sort_records([['orange', 'Florida', 700], ['lime', 'California', 100], ['blueberry', 'Maine', 400]]) == [['orange', 'Florida', 700], ['blueberry', 'Maine', 400], ['lime', 'California', 100]]
output: def sort_records(records):
      return sorted(records, key=lambda x: x[2], reverse=True)