input: Write a python function to count occurrences of a word in a webpage's HTML content.
  assert count_word_occurrences("www.example.com", "Python") == 3
  assert count_word_occurrences("www.sample.com", "Java") == 5
  assert count_word_occurrences("www.testsite.com", "HTML") == 2
output: def count_word_occurrences(url, word):
      import requests
      from bs4 import BeautifulSoup
      
      response = requests.get(url)
      content = response.text
      soup = BeautifulSoup(content, 'html.parser')
      text = soup.get_text()
      
      return text.lower().split().count(word.lower())