Some UI polish on Geo pages

What does this MR do?

Fixes a visual annoyance I was having.

Screenshots

Use geo-nodes sprite icon

Before	After

(I didn't change the 🌍 at the orange arrow, I'm just pointing at it because now it's clearer that globe indicates the project is public and there is no longer a confusion with the globe icons used for Geo)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• [-] Documentation created/updated
• [-] API support added
• [-] Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • [-] Has been reviewed by Backend
  • [-] Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• If paid feature, have we considered GitLab.com plan and how it works for groups and is there a design for promoting it to users who aren't on the correct plan

What are the relevant issue numbers?

Closes gitlab-org/gitlab-ee#4425.