docs: example code causes node_invalid_placement_ssr warning. This fixes the issue

[benquan]

this Button element causes this warning:

node_invalid_placement_ssr: `<button>` (src/lib/components/ui/button/button.svelte:60:1) cannot be a child of `<button>` (node_modules/bits-ui/dist/bits/utilities/floating-layer/components/floating-layer-anchor.svelte:34:2)

This can cause content to shift around as the browser repairs the HTML, and will likely result in a `hydration_mismatch` warning.

This change fixes #1635

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[shyakadavis]

@benquan when you first ran into the issue you're trying to fix, what versions of bits-ui and svelte were you using?

Because I don't think this issue existed pre-svelte5 and/or pre-bits-ui1.0.

[benquan]

@benquan when you first ran into the issue you're trying to fix, what versions of bits-ui and svelte were you using?

Because I don't think this issue existed pre-svelte5 and/or pre-bits-ui1.0.

I am using the latest

	"bits-ui": "^1.3.19",
	"svelte": "^5.28.1",

[shyakadavis]

I am using the latest

Interesting. Then why are you making changes targeting Svelte 4 and Bits-UI 0.x?

Since you're on the latest, I recommend using the child snippet to fix the issue.

e.g. https://bits-ui.com/docs/components/dropdown-menu#svelte-transitions