Update onboarding following ttc new ux merge

From @jacebrowning: Do we have a ticket to update the onboarding tutorial? That might be a good place — right now it thinks TTC still lives in the toolbar

<img width="1800" height="1125" alt="Image" src="https://github.com/user-attachments/assets/f4dafe61-f003-4e19-be1a-60d6b9e2735a" />