Jupiter is far enough from the sun that it already emits significantly more heat than it receives. So the sun becoming more active won't have any measurable effect on Jupiter, or any other of our gas giants, or Pluto or Charon.

If any planets ARE warming because of an increase in solar activity, the ones we should expect to see a change on are Venus, Earth, and Mars.

Venus is a good example of what happens if the greenhouse effects run amok, and Mars is a good example of the opposite. We're in the middle, at least for now.