Clarify service token generation (#4142)

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

Clarify service token generation. 
- Add that a Developer license with account admin perms are needed to
create one

Slack thread for context:
https://dbt-labs.slack.com/archives/C017GDLAF7D/p1695766588444809

## Checklist

- [x] Review the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
and [About
versioning](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version)
so my content adheres to these guidelines.

website/docs/docs/dbt-cloud-apis/service-tokens.md

@@ -18,9 +18,9 @@ You can use service account tokens for system-level integrations that do not run
 
 You can assign as many permission sets as needed to one token. For more on permissions sets, see "[Enterprise Permissions](/docs/cloud/manage-access/enterprise-permissions)."
 
-## Generating service account tokens
+## Generate service account tokens
 
-To make a service token in dbt Cloud, follow these steps:
+You can generate service tokens if you have a Developer [license](/docs/cloud/manage-access/seats-and-users) and account admin [permissions](/docs/cloud/manage-access/about-user-access#permission-sets). To create a service token in dbt Cloud, follow these steps:
 
 1. Open the **Account Settings** page by clicking the gear icon on the right-hand side.
 2. On the left sidebar, click on **Service Tokens**.