Set task max length

config.json

@@ -28,5 +28,10 @@
   "transformers_version": "4.19.2",
   "use_cache": true,
   "vocab_size": 384,
-  "max_length": 512
+  "max_length": 512,
+  "task_specific_params": {
+    "text2text-generation": {
+      "max_length": 512
+    }
+  },
 }