Point at the teammate who made the assist. People remember who shared the spotlight.

The moment after you score is the one everybody is looking at, and what you do with it is a choice about whose moment it is. Pointing at the pass costs you nothing, since the goal is already yours. What it changes is what your teammates expect from you next time. People give the ball more readily to someone who hands credit back.

Make the gesture on the next good thing you do, and be obvious about it. Name the person afterwards if anyone asks about the play. The same move works outside sport, in a group project or a shift that went well.