Updating Billing language (#3973)

## What are you changing in this pull request and why?

Adding legal requested language to the billing document.

## Checklist
<!--
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- [ ] Add a note to the prerelease version [Migration
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- [ ] Review the [Content style
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and [About
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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](https://github.com/dbt-labs/docs.getdbt.com#running-the-cypress-tests-locally)
to update the links that point to the deleted page

website/docs/docs/cloud/billing.md

@@ -70,7 +70,7 @@ All included successful models built numbers above reflect our most current pric
 
 :::note Legacy pricing plans
 
-Customers who purchased the dbt Cloud Team plan before August 8, 2023, may be on a legacy pricing plan that only includes seat-based charges. Legacy plan pricing will be supported through at least July 2024, although we may not release all new features to legacy plan subscribers. Any changes to your current plan pricing will be communicated in advance according to our Terms of Use. To ensure you have access to new features for each plan, you can upgrade now or [contact us](mailto:[email protected]) with questions.
+Customers who purchased the dbt Cloud Team plan before August 11, 2023, remain on a legacy pricing plan as long as their account is in good standing. The legacy pricing plan is based on seats and includes unlimited models subject to reasonable use. dbt Labs may institute use limits if reasonable use is exceeded. Additional features, upgrades, or updates may be subject to separate charges. Any changes to your current plan pricing will be communicated in advance according to our Terms of Use. 
 
 :::