WordPress Playground Demo: The Settings modal heading levels should only increase by one

[jonathanbossenger]

Element:

<h4 class="wporg-setup-modal__section-title">Select a theme</h4>

According to axe DevTools, to solve this problem, the invalid heading order should be fixed, probably set to an h1, and styled accordingly.

[dmsnell]

@jonathanbossenger I don't think this content is generated from within this repository, but I'm not sure from where it is. I think we need to find where the code is for the developer.wordpress.org/playground/demo is and then address the issues there.