docs: make note formatting more consistent

[GeorgeSapkin]

The note formatting seems to differ among various parts of the docs, so I've tried to normalize it a bit. I've only touched the English bits for now. I've picked the style that seems to be the most popular:

Note: Details here.

[Trott]

Looks fine to me, although I wonder if the thing to do is remove Note: entirely.

[GeorgeSapkin]

What are you suggesting? Just leave the note text without the word Note:?

Note: Details here.

I don't have a strong opinion. I'm updating the event loop guide and this irks me somewhat.

[Trott]

What are you suggesting? Just leave the note text without the word Note:?

Note: Details here.

I don't have a strong opinion. I'm updating the event loop guide and this irks me somewhat.

Yes, that's what I'm suggesting, but like you, I don't have a particularly strong opinion. The change here is 👍 by me, as would getting rid of Note: entirely. Maybe let's see what @nodejs/website folks thing.

[phillipj]

LGTM either way, with or without Note:.

If I'd have to choose, I'd lean slightly towards getting rid of Note:, primarily because the text that follows it has now been updated to be markdown quotes, which I'm assuming will highlight it a bit compared to other non-quote parts of these guides.

[GeorgeSapkin]

I removed Note: and rebased.

[sonicdoe]

To support removing “Note:” completely, we’ve made the same change two years ago in nodejs/node#18592.