fix(UndoIcon): Replace UndoIcon with RhUiUndoIcon

[rebeccaalpert]

What:
Part of #12402. Breaking into separate PRs so it is easier to review.

Additional issues:

Summary by CodeRabbit

• Style
  • Updated undo icon variant across ToggleGroup component examples and demo applications for improved visual consistency.

[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: c268407f-673c-4490-bc07-ce8da0c6bce6

📥 Commits

Reviewing files that changed from the base of the PR and between a479b4c and 12e675d.

📒 Files selected for processing (4)

• packages/react-core/src/components/ToggleGroup/examples/ToggleGroup.md
• packages/react-core/src/components/ToggleGroup/examples/ToggleGroupIcon.tsx
• packages/react-core/src/components/ToggleGroup/examples/ToggleGroupTextIcon.tsx
• packages/react-integration/demo-app-ts/src/components/demos/ToggleGroupDemo/ToggleGroupDemo.tsx

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Walkthrough

Replaces UndoIcon with RhUiUndoIcon (from rh-ui-undo-icon) across four files: the ToggleGroup markdown doc, two example components (ToggleGroupIcon.tsx, ToggleGroupTextIcon.tsx), and the integration demo (ToggleGroupDemo.tsx). Only imports and icon render props are changed.

Changes

ToggleGroup undo icon replacement

Layer / File(s)	Summary
Icon swap in ToggleGroup examples and docs packages/react-core/src/components/ToggleGroup/examples/ToggleGroup.md, packages/react-core/src/components/ToggleGroup/examples/ToggleGroupIcon.tsx, packages/react-core/src/components/ToggleGroup/examples/ToggleGroupTextIcon.tsx	Replaces UndoIcon import and all render sites with RhUiUndoIcon from rh-ui-undo-icon in the two example components and the markdown doc.
Icon swap in integration demo packages/react-integration/demo-app-ts/src/components/demos/ToggleGroupDemo/ToggleGroupDemo.tsx	Swaps the UndoIcon import and the "undo icon button" ToggleGroupItem icon prop to use RhUiUndoIcon.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• patternfly/patternfly-react#12480: Applies the same RhUi* icon replacement pattern to a different component (ellipsis icon in treeRow details toggle).

Suggested reviewers

• nicolethoen
• thatblindgeye

🚥 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 clearly and specifically describes the main change: replacing UndoIcon with RhUiUndoIcon across multiple 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-12515.surge.sh

A11y report: https://pf-react-pr-12515-a11y.surge.sh