Update generation_config.json

generation_config.json

@@ -3,6 +3,7 @@
   "eos_token_id": 100001,
   "do_sample": true,
   "num_image_tokens": 576,
+  "pad_token_id": 100015,
   "temperature": 0.7,
   "top_p": 0.95
 }