Update api-overview.md

[inalkm]

Function set_wheels_speed is not displayed correctly in the API page.

What This PR Changes

• (Please explain here why you created the pull request and specify what it changes)
• I am not really certain if I need to create a pull request for the change I am proposing. Feel free to close the pull request of not needed. When I go to Alvik's API page, set_wheels_speed function is not displayed like the other functions, which makes it hard to find. I simply rewrote the entry for this function and it seems to fix the way it is displayed. Thank you.

Contribution Guidelines

• [X ] I confirm that I have read the contribution guidelines and comply with them.

[jhansson-ard]

Thank you @inalkm for your fix!