docs: fix Table of Contents link to "in a car" section (#25225)
docs: fix Table of Contents link to "in a car" section (#25225)

* Fix Table of Contents link to "in a car" section

The heading for "Running in a car" changed to "Running on a dedicated device in a car" so the Table of Contents link no longer worked.
This PR updates the link and text in the table.

* Update README.md

Co-authored-by: Shane Smiskol <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@smiskol.com>
commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot