fix: React inert prop compatibility

[chirokas]

Closes #7502

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

🧢 Your Project:

[snowystinger]

Should this line actually be this?

Suggested change

	return value ? 'true' : undefined;
	if value == undefined {
	return undefined;
	}
	return value ? 'true' : 'false';

[chirokas]

Yes, this is also how we handled it before. See facebook/react#17157 for more details about the behavior of the inert attribute in React < 19.