Adding an explicit effect since the opa checks expect an explicit all…

…ow or deny (#491)

simple_static_website/main.tf

@@ -34,6 +34,7 @@ terraform {
 data "aws_iam_policy_document" "s3_policy" {
   statement {
     actions   = ["s3:GetObject"]
+    effect    = "Allow"
     resources = ["${aws_s3_bucket.this.arn}/*"]
 
     principals {