Adding boot disk type

Author: krsri

docs/examples/opsman-config/_aws1.html.md.erb

@@ -17,6 +17,7 @@ opsman-configuration:
     # Optional
     # vm_name: ops-manager-vm    # default - ops-manager-vm
     # boot_disk_size: 100        # default - 200 (GB)
+    # boot_disk_type: gp3        # default - gp2
     # instance_type: m5.large    # default - m5.large
                                  # NOTE - not all regions support m5.large
     # assume_role: "arn:aws:iam::..." # necessary if a role is needed to authorize