fix: mysql module read_replica add missing ssl_mode in ip_configuration (#628)

Author: strimpak

modules/mysql/read_replica.tf

@@ -76,6 +76,7 @@ resource "google_sql_database_instance" "replicas" {
         ipv4_enabled                                  = lookup(ip_configuration.value, "ipv4_enabled", null)
         private_network                               = lookup(ip_configuration.value, "private_network", null)
         require_ssl                                   = lookup(ip_configuration.value, "require_ssl", null)
+        ssl_mode                                      = lookup(ip_configuration.value, "ssl_mode", null)
         allocated_ip_range                            = lookup(ip_configuration.value, "allocated_ip_range", null)
         enable_private_path_for_google_cloud_services = lookup(ip_configuration.value, "enable_private_path_for_google_cloud_services", false)