fix: invalid refs from internal testing

Author: taharah

modules/multi-runner/runners.tf

@@ -3,8 +3,8 @@ module "runners" {
   for_each      = local.runner_config
   aws_region    = var.aws_region
   aws_partition = var.aws_partition
-  vpc_id        = coalesce(each.value.vpc_id, var.vpc_id)
-  subnet_ids    = coalesce(each.value.subnet_ids, var.subnet_ids)
+  vpc_id        = coalesce(each.value.runner_config.vpc_id, var.vpc_id)
+  subnet_ids    = coalesce(each.value.runner_config.subnet_ids, var.subnet_ids)
   prefix        = "${var.prefix}-${each.key}"
   tags = merge(local.tags, {
     "ghr:environment" = "${var.prefix}-${each.key}"