Accessibility: heading elements should be in a sequentially-descending order

[obulat]

Problem

The Chooser currently uses the <h1>-<h6> heading levels according to the design. Headings are used for creating the outline for a page, which is important for accessibility purposes. Skipping heading levels makes the outline, or website's table of contents, incorrect. This also lowers our Lighthouse Accessibility score:

Description

Fortunately, CC's design system provides a way to use the headings' visual styles in an accessible way:

To create a second-level heading that visually looks like <h5>, we can use <h2 class="title is-5">.

So, this is the list of changes that need to be introduced:

• Main heading ('License Chooser') should be <h1> that looks like h2
• Section headings (h3) should be <h2> with the style of h3
• Step header headings (h5) should be <h2> with the style of h5

Implementation

• [ ] I would be interested in implementing this feature.

[Cronus1007]

@obulat Just a suggestion regarding the labels of new issues to mark their status as ready for work since awaiting triage much refers that these issues are still on hold.

[neeraj-2]

@obulat I would like to work on it.

[zackkrida]

@Cronus1007 @neeraj-2 It was labeled 'awaiting triage' because it wasn't ready for work. Now it is though, so anyone who wants to work on it can!