There are many examples of poor sportsmanship in wrestling and all sports. However, I would never count the celebration after winning an Individual State championship as being a poor sport. Unless of course you chest bump the coach/dad of the kid you just beat.
In all seriousness, in the State Championship match, I say go for it and show your individual style and celebrate however you wish. It's hard to feel sorry for the guy who lost the match - finishing 2nd under the lights isn't too bad..........