Fixed typos in robot-simulator-test.lisp

[JKilgallen]

Summary

Fixed minor typos in test names to make testing clearer.

Checklist

• If docs where changed run ./bin/configlet generate to ensure all documents are properly generated.
• CI is green

[github-actions]

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[verdammelt]

Fixes #762

[verdammelt]

Thanks for this fix @JKilgallen