Change Trinity Force's combine price!

I'm not saying it should be reverted or rebalanced or anything. But it was so cool having its combine price be 3 gold. It's neat and flavorful! Its combine cost being 78 in light of the recent attack speed itemization changes... well, there's absolutely nothing flavorful about the number 78.

C'mon, Riot. It's such a unique item. Keep it unique! :)