docs: ✏️ update examples for module update

relates to ministryofjustice/cloud-platform#6068

examples/rds-mariadb.tf

@@ -5,7 +5,7 @@
  *
 */
 module "rds_mariadb" {
-  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.0.0"
+  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.1.0"
 
   # VPC configuration
   vpc_name = var.vpc_name

examples/rds-mssql.tf

@@ -5,7 +5,7 @@
  *
 */
 module "rds_mssql" {
-  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.0.0"
+  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.1.0"
 
   # VPC configuration
   vpc_name = var.vpc_name

examples/rds-mysql.tf

@@ -5,7 +5,7 @@
  *
 */
 module "rds_mysql" {
-  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.0.0"
+  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.1.0"
 
   # VPC configuration
   vpc_name = var.vpc_name

examples/rds-postgresql.tf

@@ -5,7 +5,7 @@
  *
  */
 module "rds" {
-  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.0.0"
+  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.1.0"
 
   # VPC configuration
   vpc_name = var.vpc_name
@@ -20,7 +20,7 @@ module "rds" {
 
   # PostgreSQL specifics
   db_engine         = "postgres"
-  db_engine_version = "16"
+  db_engine_version = "16"   # If you are managing minor version updates, refer to user guide: https://user-guide.cloud-platform.service.justice.gov.uk/documentation/deploying-an-app/relational-databases/upgrade.html#upgrading-a-database-version-or-changing-the-instance-type
   rds_family        = "postgres16"
   db_instance_class = "db.t4g.micro"
 
@@ -41,7 +41,7 @@ module "rds" {
 module "read_replica" {
   # default off
   count  = 0
-  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.0.0"
+  source = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=7.1.0"
 
   vpc_name               = var.vpc_name
 
@@ -59,14 +59,11 @@ module "read_replica" {
 
   # PostgreSQL specifics
   db_engine         = "postgres"
-  db_engine_version = "14.7"
-  rds_family        = "postgres14"
+  db_engine_version = "16"   # If you are managing minor version updates, refer to user guide: https://user-guide.cloud-platform.service.justice.gov.uk/documentation/deploying-an-app/relational-databases/upgrade.html#upgrading-a-database-version-or-changing-the-instance-type
+  rds_family        = "postgres16"
   db_instance_class = "db.t4g.micro"
   # It is mandatory to set the below values to create read replica instance
 
-  # Set the database_name of the source db
-  db_name = null # "db_name": conflicts with replicate_source_db
-
   # Set the db_identifier of the source db
   replicate_source_db = module.rds.db_identifier