input: Write a python function to generate random data and create a scatterplot.
  assert generate_scatterplot(1000) is None
output: import matplotlib.pyplot as plt
  import numpy as np
  
  def generate_scatterplot(num_points):
      x = np.random.rand(num_points)
      y = np.random.rand(num_points)
      
      plt.scatter(x, y)
      plt.xlabel('X-axis')
      plt.ylabel('Y-axis')
      plt.title('Scatterplot of Random Data')
      plt.show()