Update metadata.json: Apply 2026-05-19 audit template fix

metadata.json

@@ -10,7 +10,7 @@
         "single_image_start"
       ],
       "task_type": "multiple_choice_vqa",
-      "prompt_template": "<image>{{ question }}\nOptions:\n{% for k, v in options.items() %}{{ k }}. {{ v }}{% if not loop.last %}\n{% endif %}{% endfor %}\n",
+      "prompt_template": "<image>{{ question }}\nOptions:\n{% for k, v in options.items() %}{{ k }}. {{ v }}{% if not loop.last %}\n{% endif %}{% endfor %}\nPlease select the correct answer from the options above. \n",
       "mapping_from_source": {
         "media": {
           "from": "image",