Fix: double base64 encoding in TemplateImageNormalizer

Author: tatevikg1

src/Messaging/Serializer/TemplateImageNormalizer.php

@@ -45,7 +45,7 @@ public function normalize($object, string $format = null, array $context = []):
             'template_id' => $object->getTemplate()?->getId(),
             'mimetype' => $object->getMimeType(),
             'filename' => $object->getFilename(),
-            'data' => base64_encode($object->getData() ?? ''),
+            'data' => $object->getData() ?? '',
             'width' => $object->getWidth(),
             'height' => $object->getHeight(),
         ];