Pre-commit hook prevents workshops with common words

[oliverjam]

This is probably my fault since I suggested adding a markdown linter in #467, but the Alex setup appears to be a bit too strict. I assume no one has tried to commit new workshops in a while, because the pre-commit hook blocks commits for "warnings" in content like:

Be careful with `reject`, it’s profane in some cases
Be careful with `crash`, it’s profane in some cases
Be careful with `execute`, it’s profane in some cases
`invalid` may be insensitive
`just` may be insensitive, try not to use it

It's pretty hard to talk about code without these words 😅. I ran Alex on the whole workshop folder and nearly every file would technically be failing now.

I can bypass the hook for the workshop I'm currently writing but it might be a good idea for someone to look into maybe making warnings not a failure?

[oliverjam]

Ha it runs on CSS files too

Be careful with `color`, it’s profane in some cases
`white-space` may be insensitive