fix getClassType with no readableLink

Author: Raulnet

TypeFactory.php

@@ -99,11 +99,15 @@ private function getClassType(?string $className, string $format = 'json', ?bool
             return ['type' => 'string'];
         }
 
-        if ($this->isResourceClass($className) && true !== $readableLink) {
-            return [
-                'type' => 'string',
-                'format' => 'iri-reference',
-            ];
+        if (true !== $readableLink) {
+            if ($this->isResourceClass($className)) {
+                return [
+                    'type' => 'string',
+                    'format' => 'iri-reference',
+                ];
+            }
+
+            return ['type' => 'string'];
         }
 
         $version = $schema->getVersion();