input: Write a python function to replace special characters with space and split the text into tokens.
  assert tokenize_text("This is an example of tokenization.") == ['This', 'is', 'an', 'example', 'of', 'tokenization']
  assert tokenize_text("Hello, World!") == ['Hello', 'World']
  assert tokenize_text("Special @characters #should be replaced!") == ['Special', 'characters', 'should', 'be', 'replaced']
output: def tokenize_text(text):
      import re
      # Replace special characters with space
      text = re.sub(r'[^a-zA-Z0-9\s]', ' ', text)
      # Split the text into tokens
      tokens = text.split()
      return tokens