Add aws_route resource routing back to the HVN to AWS Transit Gateway Attachment example

Author: nphilbrook

docs/resources/aws_transit_gateway_attachment.md

@@ -72,6 +72,12 @@ resource "hcp_hvn_route" "route" {
 resource "aws_ec2_transit_gateway_vpc_attachment_accepter" "example" {
   transit_gateway_attachment_id = hcp_aws_transit_gateway_attachment.example.provider_transit_gateway_attachment_id
 }
+
+resource "aws_route" "example" {
+  route_table_id         = aws_vpc.example.main_route_table_id
+  destination_cidr_block = hcp_hvn.main.cidr_block
+  transit_gateway_id     = aws_ec2_transit_gateway_vpc_attachment_accepter.example.id
+}
 ```
 
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