fix: remove empty string elements from local.urls in iam-assumable-role-with-oidc submodule (#99)

modules/iam-assumable-role-with-oidc/main.tf

@@ -2,7 +2,7 @@ locals {
   aws_account_id = var.aws_account_id != "" ? var.aws_account_id : data.aws_caller_identity.current.account_id
   # clean URLs of https:// prefix
   urls = [
-    for url in distinct(concat(var.provider_urls, [var.provider_url])) :
+    for url in compact(distinct(concat(var.provider_urls, [var.provider_url]))) :
     replace(url, "https://", "")
   ]
   identifiers = [