docsearch v4 is available

[e-kwsm]

neovim.github.io/layouts/baseof.html

Lines 21 to 22 in a1259e6

	<!-- algolia docsearch https://docsearch.algolia.com/docs/docsearch-v3/ -->
	<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@docsearch/css@3" />

neovim.github.io/layouts/baseof.html

Lines 54 to 55 in a1259e6

	<!-- algolia docsearch https://docsearch.algolia.com/docs/docsearch-v3/ -->
	<script src="https://cdn.jsdelivr.net/npm/@docsearch/js@3"></script>

https://docsearch.algolia.com/docs/docsearch-v3/ is dead.
(must be https://docsearch.algolia.com/docs/v3/docsearch/?)

v4 seems to work but rendered differently from v3, as documented.
https://docsearch.algolia.com/docs/migrating-from-v3#styling:

We refreshed most of the CSS classes. The new version shouldn't break your existing styling, but more styles & classes were introduced in this version so you'd probably have to customize them again.

docsearch v3 (neovim.io) vs v4 (localhost)