Update EU data residency docs to include EFTA countries (Norway, Switzerland) (#60499)

Co-authored-by: Laura Coursen <lecoursen@github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

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

@@ -109,6 +109,6 @@ 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 %} and are available in all {% data variables.enterprise.data_residency %} regions: EU, Australia, US, and Japan.
+{% 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.
 
 To use {% data variables.product.prodname_github_codespaces %} from {% data variables.product.prodname_vscode_shortname %} desktop with an enterprise on {% data variables.enterprise.data_residency_site %}, you must configure the `Github-enterprise: Uri` and `Github > Codespaces: Auth Provider` settings. For more information, see [AUTOTITLE](/codespaces/developing-in-a-codespace/using-github-codespaces-in-visual-studio-code#connecting-to-an-enterprise-on-ghecom).

data/reusables/data-residency/when-you-adopt-data-residency.md

@@ -4,7 +4,7 @@ Data residency makes it easy to separate open source and enterprise work, and he
 
 The available regions are:
 
-* EU
+* EU (includes EFTA countries, Norway and Switzerland, as of May 1, 2026)
 * Australia
 * US
 * Japan