Broken aria link for radio group

[aldebout]

Documentation

https://www.w3.org/WAI/ARIA/apg/patterns/radiobutton looks like it's now https://www.w3.org/WAI/ARIA/apg/patterns/radio. I'd open a PR but I'm not sure what the rules are with the different version mdx files :)

Relevant Radix Component(s)

Radio Group

Examples from other doc sites

N/A