input: Write a python function to simulate rolling a dice and calculate the probability of rolling a six.
  assert abs(roll_dice_probability(10000) - 1/6) < 0.01
  assert abs(roll_dice_probability(5000) - 1/6) < 0.02
  assert abs(roll_dice_probability(20000) - 1/6) < 0.005
output: import random
  
  def roll_dice_probability(trials):
      six_count = sum(1 for _ in range(trials) if random.randint(1, 6) == 6)
      return six_count / trials