Dead links on project top README.md
[UX Handbook](https://about.gitlab.com/handbook/ux/)
[UX Designer Onboarding](https://about.gitlab.com/handbook/uxdesigner-onboarding/)
[UX Handbook](https://about.gitlab.com/handbook/ux/)
[UX Designer Onboarding](https://about.gitlab.com/handbook/uxdesigner-onboarding/)