input: Write a python function to plot a histogram of given data using matplotlib.
  assert plot_histogram([1, 2, 3, 4, 5, 6, 7, 8, 9])==None
  assert plot_histogram([10, 20, 30, 40, 50, 60, 70, 80, 90])==None
  assert plot_histogram([5, 15, 25, 35, 45, 55, 65, 75, 85])==None
output: def plot_histogram(data):
      import matplotlib.pyplot as plt
  
      plt.hist(data, bins='auto', edgecolor='black')
      plt.title('Histogram')
      plt.xlabel('Value')
      plt.ylabel('Frequency')
      plt.show()