Return certificate request body

Author: lonnylot

src/Controllers/AwsSnsController.php

@@ -18,7 +18,7 @@ public function __invoke()
 
         $validator = new MessageValidator(function ($certUrl) {
             return Cache::rememberForever($certUrl, function () use ($certUrl) {
-                return Http::get($certUrl);
+                return Http::get($certUrl)->body();
             });
         });