Wrong filesystem type for root

Not going to tag at this time.

base/splunk_servers/heavy_forwarder/main.tf

@@ -43,7 +43,7 @@ resource "aws_instance" "instance" {
 
   # These device definitions are optional, but added for clarity.
   root_block_device {
-    volume_type = "gp2"
+    volume_type = "gp3"
     volume_size = var.splunk_volume_sizes["heavy_forwarder"]["/"]
     delete_on_termination = true
     encrypted = true