Update cloud-seats-and-users.md

[Lana-hl]

confirmed the limitation of 1 seat for Team plan account here: https://dbt-labs.slack.com/archives/C016SATSSDT/p1692310687384219
posted user feedback: https://dbt-labs.slack.com/archives/C019QLR6EJE/p1692631037446059
ticket: https://dbtcloud.zendesk.com/agent/tickets/52721

What are you changing in this pull request and why?

Checklist

• Review the Content style guide and About versioning so my content adheres to these guidelines.
• Add a checklist item for anything that needs to happen before this PR is merged, such as "needs technical review" or "change base branch."

Adding new pages (delete if not applicable):

• Add page to website/sidebars.js
• Provide a unique filename for the new page

Removing or renaming existing pages (delete if not applicable):

• Remove page from website/sidebars.js
• Add an entry website/static/_redirects
• Ran link testing to update the links that point to the deleted page

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[mirnawong1]

🚢

[mirnawong1]

thanks for opening up @Lana-hl ! Let's ship!