Merge pull request #18 from telia-oss/fix-route-table-id-output

Fix public route table id output

outputs.tf

@@ -18,7 +18,7 @@ output "private_subnet_ids" {
 
 output "public_subnets_route_table_id" {
   description = "The ID of the routing table for the public subnets."
-  value       = aws_route_table.public[*].id
+  value       = concat(aws_route_table.public[*].id, [""])[0]
 }
 
 output "private_subnets_route_table_ids" {