fix: update vehicle hotkeys

[mozhoku]

Description

Updated the:

• hotkeys
• hotkey information in the UI,
• hotkey information in the docs.

Related links

Tests performed

Tested in the Editor.

Effects on system behavior

Not applicable.

Notes for reviewers

Pre-review checklist for the PR author

The PR author must check the checkboxes below when creating the PR.

• I've confirmed the contribution guidelines.
• The PR follows the pull request guidelines.

In-review checklist for the PR reviewers

The PR reviewers must check the checkboxes below before approval.

• The PR follows the pull request guidelines.

Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.

After all checkboxes are checked, anyone who has write access can merge the PR.

[github-actions]

Documentation URL: https://autowarefoundation.github.io/AWSIM-Labs/pr-148/
Modified URLs:

• https://autowarefoundation.github.io/AWSIM-Labs/pr-148/ProjectGuide/HotkeyList/