Update Terraform github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars to v0.4.2 (#491)

* Update Terraform github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars to v0.4.2

* Updated Readme

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Ash Davies <3853061+DrizzlyOwl@users.noreply.github.com>

Author: renovate[bot]

terraform/README.md

@@ -138,7 +138,7 @@ No providers.
 | Name | Source | Version |
 |------|--------|---------|
 | <a name="module_azure_container_apps_hosting"></a> [azure\_container\_apps\_hosting](#module\_azure\_container\_apps\_hosting) | github.com/DFE-Digital/terraform-azurerm-container-apps-hosting | v1.6.4 |
-| <a name="module_azurerm_key_vault"></a> [azurerm\_key\_vault](#module\_azurerm\_key\_vault) | github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars | v0.4.1 |
+| <a name="module_azurerm_key_vault"></a> [azurerm\_key\_vault](#module\_azurerm\_key\_vault) | github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars | v0.4.2 |
 | <a name="module_statuscake-tls-monitor"></a> [statuscake-tls-monitor](#module\_statuscake-tls-monitor) | github.com/dfe-digital/terraform-statuscake-tls-monitor | v0.1.4 |
 
 ## Resources

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=v0.4.1"
+  source = "github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars?ref=v0.4.2"
 
   environment                             = local.environment
   project_name                            = local.project_name