fix: Update Link to Enterprise Billing Admin docs from Org Docs

[Lucisano]

Why:

This should now point directly to the Enterprise User management documentation as it was a bit of pain to track these down originally as the existing link simply takes you to the overview.

The new link points to the correct documentation for the correct process

Closes:

What's being changed (if available, include any code snippets, screenshots, or gifs):

Used to point to
https://docs.github.com/en/enterprise-cloud@latest/admin/managing-your-enterprise-account/about-enterprise-accounts

Now points to
https://docs.github.com/en/enterprise-cloud@latest/admin/managing-accounts-and-repositories/managing-users-in-your-enterprise/inviting-people-to-manage-your-enterprise

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[github-actions]

How to review these changes 👓

Thank you for your contribution. To review these changes, choose one of the following options:

• Spin up a codespace
• Set up a local development environment

A Hubber will need to deploy your changes internally to review.

Table of review links

Note: Please update the URL for your staging server or codespace.

The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
organizations/managing-peoples-access-to-your-organization-with-roles/adding-a-billing-manager-to-your-organization.md	fpt ghec	fpt ghec

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

🤖 This comment is automatically generated.

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[Copilot]

Pull Request Overview

This PR updates a documentation link in the organization billing manager documentation to point to more specific and relevant enterprise user management documentation. The change improves user navigation by directing readers to the exact process documentation instead of a general overview.

Key changes:

• Updated AUTOTITLE link to point to specific enterprise user management documentation
• Changed from general enterprise account overview to targeted invitation process documentation

[Sharra-writes]

@Lucisano Looks like a more detailed source of information, so I'll approve it. 👍

[github-actions]

Thanks very much for contributing! Your pull request has been merged 🎉 You should see your changes appear on the site in approximately 24 hours. If you're looking for your next contribution, check out our help wanted issues ⚡