Fix HTML entities

[wtn]

In the README:

[ioquatix]

This release notes is generated automatically. Something is wrong with the escaping in utopia-project.

[wtn]

Thanks for letting me know. That came to mind after I opened the issue.

[ioquatix]

Thanks for bringing attention to this issue. I fixed utopia-project: socketry/utopia-project@13cfae7

Turns out XRB is not good for generating markdown output (which is to be expected). Maybe later we can introduce Markly::Builder for conveniently generating markdown. Because all the rules are different, from escaping, to indentation, etc.