Update GEI migration paths reusable (#58141)

Co-authored-by: Justin Alex <[email protected]>
Co-authored-by: mc <[email protected]>

Author: 3 people

data/reusables/enterprise-migration-tool/supported-migration-paths.md

@@ -4,3 +4,6 @@
 * Bitbucket Server and Bitbucket Data Center 5.14+
 * {% data variables.product.prodname_dotcom_the_website %}
 * {% data variables.product.prodname_ghe_server %} (GHES) 3.4.1+
+
+> [!NOTE]
+> {% data variables.product.prodname_importer_proper_name %} does not currently support migrations **from {% data variables.enterprise.data_residency_site %}.**