Make the robusted donuts cost 2 utility credits

[Nihisohel]

relatedly, the lazy man's patch, no fine-tuning necessary:
https://github.com/goonstation/goonstation/pull/9041

as a sec main that doesnt use these things, i find them really powerful when they ARE used, more so when a box is fitted with it,

while decreasing to only 1 of each donut type could help, nobody can stop anyone from using their other util (or some newsecs stray util) for another box, which still remains the issue of it being overpowered to shit

- sec gets healing from donuts
- the special donuts have more bites than normal
- the special donuts have heal stims filling its entire container
- coupled with survivalist can pretty much uncrit a guy almost immediately
- the accompanying stamina buff too

in my opinion, the argument of sec shouldnt rely on medical or step on the medical shoes (in an rp perspective) is stupid, a secoff should definitely know how to save oneself and not being a bumbling fuck about it, which makes the usage of donuts pumped with healing shit is an even stupider take to this argument

sec should die when they will die, not get a second on the field chance at it, if they want the special donuts, by all means keep some in the armory or literally just pump a normal donut with the appropriate meds