fix(LinkIcon): Replace LinkIcon with RhUiLinkIcon

[rebeccaalpert]

What:
This is one piece of #12400. Breaking it up by icon so it is easier to review.

Additional issues:

Summary by CodeRabbit

• Documentation
  • Updated navigation component example documentation to reflect revised icon usage in the Nav examples.
• UI Updates
  • Adjusted the navigation icons in example code to use the updated link icon component for the Link 4 item.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 4f056ed2-6124-425b-89eb-cb93da4f772b

📥 Commits

Reviewing files that changed from the base of the PR and between a893b4b and 750f4ac.

📒 Files selected for processing (2)

• packages/react-core/src/components/Nav/examples/Nav.md
• packages/react-core/src/components/Nav/examples/NavIcons.tsx

✅ Files skipped from review due to trivial changes (2)

• packages/react-core/src/components/Nav/examples/Nav.md
• packages/react-core/src/components/Nav/examples/NavIcons.tsx

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Walkthrough

The Nav component examples are updated to use RhUiLinkIcon instead of LinkIcon. The import statement is added to the Nav.md documentation, the import in NavIcons.tsx is replaced, and the Link 4 NavItem icon prop is updated to render the new icon.

Changes

Nav example icon update

Layer / File(s)	Summary
Update Nav examples to use RhUiLinkIcon packages/react-core/src/components/Nav/examples/Nav.md, packages/react-core/src/components/Nav/examples/NavIcons.tsx	Nav examples documentation and component are updated to import and render RhUiLinkIcon instead of LinkIcon for the Link 4 NavItem.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• wise-king-sullyman
• nicolethoen
• thatblindgeye
• kmcfaul

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: replacing LinkIcon with RhUiLinkIcon across the updated files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[patternfly-build]

Preview: https://pf-react-pr-12456.surge.sh

A11y report: https://pf-react-pr-12456-a11y.surge.sh

[thatblindgeye]

Just needs a rebase