Update lab path

[olberger]

Just a tiny typo fix

[olberger]

Oops, more commits were needed for a proper fix

[Mierdin]

Thanks for this, but I think I might do something a bit more extreme and just map the lesson directory specifically to /antidote, so that you don't have to have the specific lesson directory in the cd command here. I'll keep this open for now, but I may close this if it works out that way

[Mierdin]

Closing in favor of #227 as discussed.