fix: correct access to crossOrigin attribute

[benmccann]

Description

Credit to @Rich-Harris for this. He noticed that the casing was wrong here:

'crossorigin' in document.createElement('link'); // false
'crossOrigin' in document.createElement('link'); // true

Also renaming the variable here since the function is only called with a link and not a script

Additional context

Even with the fix, the feature still seems pretty broken: #5532

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the PR Title Convention.
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• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[bluwy]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI: Open

suite	result
astro	✅ success
histoire	✅ success
iles	✅ success
ladle	✅ success
laravel	✅ success
marko	✅ success
nuxt-framework	✅ success
previewjs	✅ success
qwik	✅ success
rakkas	✅ success
sveltekit	✅ success
vite-plugin-ssr	✅ success
vite-plugin-react	✅ success
vite-plugin-react-pages	✅ success
vite-plugin-react-swc	✅ success
vite-plugin-svelte	✅ success
vite-plugin-vue	✅ success
vite-setup-catalogue	❌ failure
vitepress	✅ success
vitest	✅ success
windicss	✅ success

[sapphi-red]

Suggested change

	if (link.referrerpolicy) fetchOpts.referrerPolicy = link.referrerpolicy
	if (link.referrerPolicy) fetchOpts.referrerPolicy = link.referrerPolicy

'referrerPolicy' in document.createElement('link') // true
'referrerpolicy' in document.createElement('link') // false

It seems this one is also wrong. (applied this change)

[sapphi-red]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI: Open

suite	result
astro	✅ success
histoire	✅ success
iles	✅ success
ladle	✅ success
laravel	✅ success
marko	✅ success
nuxt-framework	✅ success
previewjs	✅ success
qwik	✅ success
rakkas	✅ success
sveltekit	✅ success
vite-plugin-ssr	✅ success
vite-plugin-react	✅ success
vite-plugin-react-pages	✅ success
vite-plugin-react-swc	✅ success
vite-plugin-svelte	✅ success
vite-plugin-vue	✅ success
vite-setup-catalogue	❌ failure
vitepress	✅ success
vitest	✅ success
windicss	✅ success