Update W3 link in the Tabs documentation to not lead to a 404 page

[lukebrobbs]

The W3 Link on the Tabs component currently leads to a 404 page. The updated link leads to the correct Tabs WAI-ARIA design pattern docs. Preview URL

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This pull request:

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