input: Write a python function to find the student with the highest score from a list of tuples.
  assert find_highest_score([("John", 88), ("Emma", 92), ("Sophia", 95)]) == ("Sophia", 95)
  assert find_highest_score([("Max", 75), ("Liam", 85), ("Ella", 80)]) == ("Liam", 85)
  assert find_highest_score([("Ava", 90), ("Mia", 91), ("Isabella", 89)]) == ("Mia", 91)
output: def find_highest_score(students):
      return max(students, key=lambda student: student[1])