input: Write a python function to check if a given search string is present in a given text using regular expressions.
  assert search_string('The quick brown fox jumped over the lazy dog', 'fox') == True
  assert search_string('The quick brown fox jumped over the lazy dog', 'cat') == False
  assert search_string('Hello, World!', 'World') == True
output: import re
  
  def search_string(text, search):
      return bool(re.search(search, text))