Resolve broken relative logo sources on npmjs (relative → absolute)

[brandonmcconnell]

@RobinMalfait Looks like that last PR caused a slight regression on npmjs where the logo is completely broken now, because it registers the source URLs as relative links instead of absolute links.

You can see that bug here: https://www.npmjs.com/package/tailwindcss

Before and after this PR (assuming this works 🤷🏻‍♂️… it should)

	Before	After
Light
Dark

Unfortunately, npmjs doesn't yet have a dark mode of their own, so even after corrected, the logo will be mostly invisible on their site unless a stroke or some other sort of style is added to the logo to add contrast between the white text and white background.

[RobinMalfait]

Hey! Thank you for your PR!
Much appreciated! 🙏

Very odd, we used relative URLs before as well 🤔

[brandonmcconnell]

@RobinMalfait It appears the relative links work on npmjs for img elements but not source.

Probably worth opening a ticket on npmjs for this as well.

And… there

• Relative image URLs break for `picture` → `source` npm/feedback#792
• Workaround to force light mode styles until dark mode is ready npm/feedback#793

[brandonmcconnell]

Btw it appears that npmjs has since fixed that issue, so the correct logo displays for both light and dark mode, at least AFAICT when checking locally