Fixed spec violations in noteable_note_spec.js for vue3 migration

What does this MR do and why?

Implements #391148 (closed).

Fixes jest spec violations for the vue3-migration.

Screenshots or screen recordings

No visible changes

How to set up and validate locally

1. Run yarn jest spec/frontend/notes/components/noteable_note_spec.js
2. Or check the pipeline passes

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #391148 (closed)