A Slight nerf to NO2

[elan_oots]

This seems kind of kneejerky. N2O is rare enough and hard enough to use effectively that it's not a balance issue. N2O has its uses in medbay, and having it let people wake up during surgery would be bad if, for example, you were doing surgery on a monkey. Additionally, N2O is not an instant knockout, you have a little bit of time to run away if you didn't have internals. If you get caught in a cloud of N2O without internals, it's your own fault.