input: Write a python function to fetch JSON data from a URL and sort it by its values in descending order.
  assert sort_json_data('http://example.url/data1.json') == [('key2', 20), ('key1', 10), ('key3', 5)]
  assert sort_json_data('http://example.url/data2.json') == [('a', 50), ('c', 30), ('b', 25)]
  assert sort_json_data('http://example.url/data3.json') == [('x', 100), ('z', 80), ('y', 60)]
output: import requests
  
  def sort_json_data(url):
      response = requests.get(url)
      data = response.json()
      sorted_data = sorted(data.items(), key=lambda item: item[1], reverse=True)
      return sorted_data