docs(local-setup): fix npx command

[kroeder]

Description

This does not work

npx commitlint --from HEAD~1 --to HEAD --verbose

and should be

npx commitlint -- --from HEAD~1 --to HEAD --verbose

Motivation and Context

Improve documentation code snippet

How Has This Been Tested?

Tested it in my own project while setting commitlint up

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[escapedcat]

Thanks @kroeder !