Use m-dash instead of a hyphen

Hyphen is not supposed to be used to divide words (but to join them), see https://practicaltypography.com/hyphens-and-dashes.html

Also, when you look at a screenshot of the current arrangement, it looks kind of ugly and inconsistent (compare the windows title): https://pointieststick.com/wp-content/uploads/2024/05/its-dangerous.jpeg?w=1024

Thanks for the overall changes to, they make a lot of sense to me:-)!