fix(s2): add space between timefield and calendar in DateRangePicker

[yihuiliao]

noticed during testing, fixed to match design

✅ 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:

go to DateRangePicker, select the Zoned story, and open the Popover. make sure that the spacing is correct between the calendar and timefields

🧢 Your Project:

[rspbot]

Build successful! 🎉

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[LFDanLu]

good catch, verified against the figma (though technically the figma has 24 + 7 from the timefield's top label)