Change stimulants TC cost to 6

[Froggit_Dogget]

I don't think their price is the issue here. Its the fact that they have no counter, other than hiding for 5 minutes. Before they got changed to a status effect, you could counter them with calomel. However, this was also before it was obvious someone was on stimulants. If there was a better counter, such as the medical directors mutadone darts, mutadone in general, or some new chem that could fit into an un-hacked syringe gun, that would be a better change.