fix(docs): Update broken W3.org links in Table Cell Navigation documentation

[Copilot]

Summary

Fixed broken W3.org links in Table Cell Navigation documentation that were returning 404 errors. The W3C ARIA Authoring Practices Guide (APG) has restructured their URLs, and the old links were no longer valid.

Problem

The Table Cell Navigation example documentation contained links to https://www.w3.org/WAI/ARIA/apg/example-index/grid/dataGrids which now return 404 errors. This affected developers trying to access the official ARIA grid pattern documentation for implementing accessible table navigation.

Solution

Updated all references to use the new correct URL structure:

• From: https://www.w3.org/WAI/ARIA/apg/example-index/grid/dataGrids
• To: https://www.w3.org/WAI/ARIA/apg/patterns/grid/examples/data-grids/

Files Changed

• packages/react-components/react-table/stories/src/Table/CellNavigation.stories.tsx - Updated Storybook documentation parameters
• packages/react-components/react-table/stories/src/Table/TableDescription.md - Updated main Table component description
• packages/react-components/react-table/library/docs/Spec.md - Updated both inline links and accessibility resources list

Impact

• ✅ Developers can now access working links to W3C ARIA grid pattern examples
• ✅ Table Cell Navigation documentation is fully functional
• ✅ Maintains consistency across all Table-related documentation
• ✅ No breaking changes to component functionality

Closes #[issue-number]

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Docs]: Table Cell Navigation example has broken link to w3.org</issue_title>
<issue_description>### Area

React Components (https://react.fluentui.dev)

What kind of documentation issue are you reporting?

• Reporting a typo
• Reporting a documentation bug
• Documentation improvement
• Documentation feedback

Is there a specific documentation page you are reporting?

https://react.fluentui.dev/?path=/docs/components-table--docs#cell-navigation

Description

The link aria-role="grid" pattern is broken. Maybe aria-role="grid" pattern is the new target page.

Validations

• Check that there isn't already an issue that requests the same feature to avoid creating a duplicate.</issue_description>

<agent_instructions>use https://www.w3.org/WAI/ARIA/apg/patterns/grid/examples/data-grids/ to fix the link as the current points to 404</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes #35197

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