Rename "OSM data" example to "OpenStreetMap data"

[abey79]

What

Tittle change for better legibility and, in particular, spelling the "Map" word full for discoverability.

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!
• If have noted any breaking changes to the log API in CHANGELOG.md and the migration guide

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[github-actions]

Latest documentation preview deployed successfully.

Result	Commit	Link
✅	ea6fd92	https://landing-dpf44waau-rerun.vercel.app/docs

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[Wumpf]

would be even better if the folder/file names would be renamed as well

[Wumpf]

thaaaanks x3