fix: device_model and device_name properties were inverted

[marandaneto]

:bulb: Motivation and Context

They now match the taxonomy https://github.com/PostHog/posthog/edit/master/frontend/src/lib/taxonomy.tsx

:green_heart: How did you test it?

fix: device_model and device_name properties were inverted

:pencil: Checklist

• [X] I reviewed the submitted code.
• [ ] I added tests to verify the changes.
• [ ] I updated the docs if needed.
• [X] No breaking change or entry added to the changelog.