updated DB multi-cell link (#5888)

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Steve Dowling reached out via Slack (thread:
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and https://dbt-labs.slack.com/archives/C02NCQ9483C/p1722610147178019)
to advise the redirect url for databricks oauth needs to be the region
domain. Topher also confirmed this.

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Adding or removing pages (delete if not applicable):
- [ ] Add/remove page in `website/sidebars.js`
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---------

Co-authored-by: Mirna Wong <[email protected]>

website/docs/docs/cloud/manage-access/set-up-databricks-oauth.md

@@ -31,12 +31,12 @@ To get started, you will need to [add dbt as an OAuth application](https://docs.
    - The refresh token time-to-live (TTL) in minutes. Default: 10080.
 4. Select **Generate a client secret**. Copy and securely store the client secret. The client secret will not be available later.
 
-You can use the following table to set up the redirect URLs for your application, replacing ACCOUNT_PREFIX with the cell 1 prefix for your region and INSTANCE_NAME with the custom name of your instance:
+You can use the following table to set up the redirect URLs for your application with dbt Cloud:
 
 | Region | Redirect URLs |
 | ------ | ----- |
 | **US multi-tenant** | https://cloud.getdbt.com/callback <br /> https://cloud.getdbt.com/complete/databricks |
-| **US cell 1** | https://ACCOUNT_PREFIX.us1.dbt.com/callback <br /> https://ACCOUNT_PREFIX.us1.dbt.com/complete/databricks |
+| **US cell 1** | https://us1.dbt.com/callback <br /> https://us1.dbt.com/complete/databricks |
 | **EMEA** | https://emea.dbt.com/callback <br /> https://emea.dbt.com/complete/databricks |
 | **APAC** | https://au.dbt.com/callback <br /> https://au.dbt.com/complete/databricks |
 | **Single tenant** | https://INSTANCE_NAME.getdbt.com/callback <br /> https://INSTANCE_NAME.getdbt.com/complete/databricks