Update 1.1.3.mdx - Fix WAI-ARIA RadioGroup pattern url

[federico-rimembrana]

The current link is leading to a Document not found page. This PR fixes it with the right pattern url.

Preview link to test the fix: https://radix-website-git-fork-federico-rimembrana-patch-1-workos.vercel.app/themes/docs/components/radio-group

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• [x] Test the change in your own code.
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This pull request:

• [ ] Fixes a bug
• [ ] Adds additional features/functionality
• [x] Updates documentation or example code
• [ ] Other