Fix text alignment issue in celebrate invite modal

What does this MR do and why?

Fixes the visual regression introduced in !79247 (merged)

This fix will take us back to the original visual display of it in !70011 (merged)

Screenshots or screen recordings

before	after

How to set up and validate locally

1. Register as a new user by visiting http://localhost:3000/users/sign_up(or by clicking Register now from http://localhost:3000/users/sign_in)
2. Select any Role and Answer Just me and Create a new project on the http://localhost:3000/users/sign_up/welcome page(no other fields need filled out/changed)
3. Click Continue
4. On the next screen, fill out new Group and Project names.
5. Wait for the Get Started with GitLab to finish(~5s or less).
6. Click Ok, let's go.
7. Observe invite modal open on next screen.

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 #388654 (closed)