Repetitive 'Spring' id for 'https://svelte.dev/docs/svelte/svelte-motion#Spring' page

[Em-ilien]

The https://svelte.dev/docs/svelte/svelte-motion documentation page contains two <h2> elements with the same id="Spring", which causes duplicate ID issues.
The sidebar has also two <li> underlined.

[Conduitry]

Hm. Moving this to the svelte.dev repo - The Markdown generated for this section looks correct (with ## Spring and ## spring for the two sections, so I'm not sure why they're both getting rendered in the site as "Spring".

[Conduitry]

Oh. This is the svelte.dev repo already. Oops. But yes, this looks like a rendering issue in the site, not an issue in the underlying Markdown coming from the svelte repo.

[zqianem]

Duplicate of #1281