Fix missing required prop in onboarding_setup_spec

What does this MR do and why?

Fixes jest warnings for the missing dashboardPaths prop for ee/spec/frontend/product_analytics/onboarding/onboarding_setup_spec.js

Screenshots or screen recordings

No user facing changes, this affects local dev.

Before	After

How to set up and validate locally

All tests pass with no warnings in the console

$ yarn jest ee/spec/frontend/product_analytics/onboarding/onboarding_setup_spec.js

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.