Updated key vault version (#129)

Author: mshakirdfe

terraform/key-vault-tfvars-secrets.tf

@@ -1,5 +1,5 @@
 module "azurerm_key_vault" {
-  source = "github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars?ref=v0.5.1"
+  source = "github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars?ref=v0.5.2"
 
   environment                             = local.environment
   project_name                            = local.project_name