fix(max-length): increased max-length in config

config.json

@@ -1,5 +1,11 @@
 {
   "_name_or_path": "Dmitriy007/rugpt2_gen_news",
+  "task_specific_params": {
+    "text-generation": {
+      "do_sample": true,
+      "max_length": 256
+    }
+  },
   "activation_function": "gelu_new",
   "architectures": [
     "GPT2LMHeadModel"