Add intro between H1 and H2 to pages missing it

[romaricpascal]

What

Add some introductory content to pages having nothing between their H1 and H2:

• Install with Node.js package manager (npm)
• Sass API reference

Why

For consistency with the other pages, but also because the lack of content between headings may look like (sound, more accurately) content is missing for assistive technology when the page is being read out.

Who needs to know about this

Tech writers, Developers

Done when

• Install with Node.js package manager (npm) has an intro
• Sass API reference has an intro

[calvin-lau-sig7]

Thanks for the heads-up. Yeah, I think this makes sense to do – I vaguely remember that this isn't a serious accessibility issue, but more good content practice so users can be sure they're on the right page.

I think having good content here also helps with generating good 'page descriptions' that get shown on search results, page previews in social media, etc.

Even something basic and obvious would work.