Added senstitive=true field in 'primary' output in mssql module, sinc…

…e there are some sensitive fields in google_sql_database_instance resource.

modules/mssql/outputs.tf

@@ -82,4 +82,5 @@ output "root_password" {
 output "primary" {
   value       = google_sql_database_instance.default
   description = "The `google_sql_database_instance` resource representing the primary instance"
+  sensitive   = true
 }