Issues on unit tests of Markdown exercise

[M-AminAlizadeh]

Hey there

According to the Markdown Exercise after installing the packages while
testing the code it shows an error because in the markdown-spec.js file there is a mistake (typo issue) of xtest instead of test

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I can fix it and make the PR for it
Kindly let me know if it's ok

[github-actions]

Hello. Thanks for opening an issue on Exercism 🙂

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[SleeplessByte]

(As written on the forum, this is a bun issue, not an exercise issue and not a typo 😄)