change itemType for google could from how to to tutorial

Author: markingmyname

articles/migration/index.yml

@@ -197,10 +197,10 @@ conceptualContent:
             itemType: reference
           - url: /azure/postgresql/migrate/migration-service/tutorial-migration-service-cloud-sql-offline
             text: Migrate to Azure Database for PostgreSQL (offline)
-            itemType: how-to-guide
+            itemType: tutorial
           - url: /azure/postgresql/migrate/migration-service/tutorial-migration-service-cloud-sql-online
             text: Migrate to Azure Database for PostgreSQL (online)
-            itemType: how-to-guide
+            itemType: tutorial
           - url: /azure/azure-sql/migration-guides/database/mysql-to-sql-database-guide?view=azuresql-db&preserve-view=true
             text: Migrate MySQL on Google Cloud to Azure Database for MySQL
             itemType: tutorial