fix: remove elon

[vaeng]

Due to recent events, I would like to rename the exercise from Elon to Jedlik.

Ányos Jedlik was the first person to build an electric toy car.

In 1828, the Hungarian priest and physicist Ányos Jedlik invented an early type of electric motor and created a small model car powered by his new motor.

This came from a conversation with @iHiD. I hope raising this PR without being a maintainer of this track is okay.

[github-actions]

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