Add a different sprite for the robust(ed) donuts box

[Kelpo]

They are the same sprite as the internals box, Granted I usually dump my donuts into the internals box, I do actually like to keep the box of robust donuts for x reasons but having the same sprite as internals box is confusing if you forgot which one was the robust donuts box and which one was internals box. in a life or death situation, that downtime could be the end of you or the person you wanted to heal.

[cyberTripping]

This is a PR currently pending. https://github.com/goonstation/goonstation/pull/6484