input: Write a function named `get_stock_price` that takes a stock name as input and returns the latest stock price from the Yahoo Finance website. Ensure the function uses the `requests` and `BeautifulSoup` libraries to scrape the data. The function should return a string representing the stock price.
  assert get_stock_price("AAPL")=="145.09"
  assert get_stock_price("MSFT")=="250.89"
  assert get_stock_price("FB")=="345.78"
  assert get_stock_price("GOOG")=="2789.12"
output: def get_stock_price(stock_name):
      import requests
      from bs4 import BeautifulSoup
      url = f"https://finance.yahoo.com/quote/{stock_name}"
      response = requests.get(url)
      soup = BeautifulSoup(response.text, 'html.parser')
      price = soup.find('fin-streamer', {'data-field': 'regularMarketPrice'}).text
      return price