bug(docs): code formatting is broken when there are multiple tabs

[aeryz]

Hey, I was going through your docs and realized formatting of some of your samples are broken. It seem to be whenever there are multiple tabs, the first tab is like the attached image. I'm on Firefox + NixOS.

https://rivet.dev/actors/docs/crash-course/

[linear]

ACT-6392

[iinaa-eimrit]

Hey @jog1t, could you please assign this issue to me? I have opened PR #5580 with a fix for the MDX formatting, as well as fixing the CI workflow errors on forks!