docs: Add Japan to Codespaces data residency supported regions (#60349)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Steve-Glass <84886334+Steve-Glass@users.noreply.github.com>
Co-authored-by: isaacmbrown <isaacmbrown@github.com>

Author: 3 people

content/admin/data-residency/feature-overview-for-github-enterprise-cloud-with-data-residency.md

@@ -103,4 +103,4 @@ Some features on {% data variables.enterprise.data_residency_site %} are current
 
 ### {% data variables.product.prodname_github_codespaces %}
 
-{% data variables.product.prodname_github_codespaces %} on {% data variables.enterprise.data_residency_site %} are in {% data variables.release-phases.public_preview %}.
+{% data variables.product.prodname_github_codespaces %} on {% data variables.enterprise.data_residency_site %} are in {% data variables.release-phases.public_preview %} and are available in all {% data variables.enterprise.data_residency %} regions: EU, Australia, US, and Japan.

content/admin/enforcing-policies/enforcing-policies-for-your-enterprise/enforcing-policies-for-github-codespaces-in-your-enterprise.md

@@ -12,8 +12,6 @@ category:
   - Secure and govern your enterprise
 ---
 
->[!NOTE] {% data variables.product.prodname_github_codespaces %} is not available for enterprises that use {% data variables.enterprise.data_residency %}.
-
 ## About enterprise policies for {% data variables.product.prodname_github_codespaces %}
 
 As an enterprise owner, you can set a policy to enable or disable {% data variables.product.prodname_github_codespaces %} across organizations in your enterprise. You can enable {% data variables.product.prodname_github_codespaces %} for all organizations, enable for specific organizations, or disable for all organizations.

content/admin/managing-iam/understanding-iam-for-enterprises/abilities-and-restrictions-of-managed-user-accounts.md

@@ -38,11 +38,10 @@ With {% data variables.product.prodname_emus %}, you can control the user accoun
 
 ## {% data variables.product.prodname_github_codespaces %}
 
-* On {% data variables.product.prodname_dotcom_the_website %}, {% data variables.enterprise.prodname_managed_users %} can only create codespaces that are owned by the enterprise. This means that {% data variables.enterprise.prodname_managed_users %}:
+* {% data variables.enterprise.prodname_managed_users %} can only create codespaces that are owned by the enterprise. This means that {% data variables.enterprise.prodname_managed_users %}:
   * Can create codespaces for repositories owned by their organization, or forks of these repositories, provided that the organization can pay for {% data variables.product.prodname_github_codespaces %}. See [AUTOTITLE](/codespaces/managing-codespaces-for-your-organization/choosing-who-owns-and-pays-for-codespaces-in-your-organization).
   * Cannot create codespaces for their personal repositories, any repositories outside their organizations, or {% data variables.product.company_short %}'s public templates for {% data variables.product.prodname_github_codespaces %}.
   * Cannot publish a codespace created from a template to a new repository.
-* On {% data variables.enterprise.data_residency_site %}, {% data variables.product.prodname_github_codespaces %} is not available to any users.
 
 ## {% data variables.product.prodname_copilot %}