fix: correct floating precision in snapValueToStep

[TMH-SE]

Closes Issue#6112

✅ 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:

Test with the same steps in the issue above

[LFDanLu]

GET_BUILD

[LFDanLu]

Tested locally and verified the issue of improper snapping at the min/max mentioned in the issue no longer happens. Mind adding a test for the failing case you found previously to https://github.com/adobe/react-spectrum/blob/main/packages/%40react-spectrum/numberfield/test/NumberField.test.js?

[rspbot]

Build successful! 🎉

• View the storybook
• View the storybook-17
• View the storybook-16
• View the documentation

[rspbot]

## API Changes

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