Merge branch 'renovate/vultr-2.x' into 'master'

Update Terraform vultr to v2.12.1

See merge request sys/infrastructure!75

terraform/terraform.tf

@@ -6,7 +6,7 @@ terraform {
     }
     vultr = {
       source  = "vultr/vultr"
-      version = "2.1.4"
+      version = "2.12.1"
     }
     aws = {
       source  = "hashicorp/aws"

terraform/vultr_firewall/terraform.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     vultr = {
       source  = "vultr/vultr"
-      version = "2.1.4"
+      version = "2.12.1"
     }
   }
 }