fix: Picker default text display

[snowystinger]

Closes

Found while working on another branch after merging in main

✅ 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:

First comment should show the broken behaviour when you select an item in the S2 Picker Avatar story
Second comment should show it fixed

🧢 Your Project:

[rspbot]

Build successful! 🎉

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• View the S2 storybook
• View the documentation
• View the S2 docs