chore: upgrade @eslint/js@9.6.0

[mdjermanovic]

Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request? (put an "X" next to an item)

[ ] Documentation update
[ ] Bug fix (template)
[ ] New rule (template)
[ ] Changes an existing rule (template)
[ ] Add autofix to a rule
[ ] Add a CLI option
[ ] Add something to the core
[x] Other, please explain:

Upgrades @eslint/js to keep eslint and @eslint/js in lockstep.

What changes did you make? (Give an overview)

Updated package.json

Is there anything you'd like reviewers to focus on?

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