Update github.mdx (#1022)

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Update to the Github App doc
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Author: mibali

docs/admin/code_hosts/github.mdx

@@ -109,6 +109,11 @@ Once public, App can be installed in additional namespaces either from Sourcegra
 
 5. To sync repositories from this installation, click **Add connection** under your new installation.
 
+### Configuring Multiple Private GitHub Apps for Sourcegraph
+If you prefer not to make your GitHub App public and instead create separate private GitHub Apps for each organizations, users will need to authorize each GitHub App individually to ensure proper repository access and permissions syncing. This is because GitHub Apps have narrowly scoped permissions and do not share authentication across multiple installations. To streamline this process, users can go to `User Settings` > `Account Security` in Sourcegraph and connect all necessary GitHub Apps from there. Once authorized, Sourcegraph will use the user's GitHub identity to determine access across all configured GitHub Apps. 
+
+For customers using GitHub Enterprise Cloud, an alternative approach is to create an Enterprise GitHub App, which can be installed across multiple organizations within an enterprise account while maintaining private visibility. More details on this approach can be found in [GitHub's documentation](https://docs.github.com/en/enterprise-cloud@latest/admin/managing-your-enterprise-account/creating-github-apps-for-your-enterprise).
+
 ### Uninstalling an App
 
 You can uninstall a GitHub App from a namespace or remove it altogether at any time.