How do I get rid of these bees/wasps in my sunroom?
That is a very small nest. Since the sunroom is indoors, I would not recommend using wasp spray, especially if the label on the can recommends against indoor use.

1) They'll be back if you do not plug their entry way into your sunroom.  

2) Insecticide spray is not necessary.  Just knock the nest down with a broom handle or similar, then leave the sunroom, closing the door behind you.  The few that might be in the nest will calm down and may exit the sunroom to the outdoors.  If not, they can killed with a flyswatter or kitchen towel.