Update tier for enterprise plus

Author: glasnt

cloud_sql/sqlserver_instance_pitr/main.tf

@@ -42,7 +42,7 @@ resource "google_sql_database_instance" "enterprise" {
   region           = "asia-northeast1"
   database_version = "SQLSERVER_2019_ENTERPRISE"
   settings {
-    tier    = "db-custom-4-26624"
+    tier    = "db-perf-optimized-N-2"
     edition = "ENTERPRISE"
     backup_configuration {
       enabled                        = true