Tokenizer config fix

tokenizer_config.json

@@ -1,10 +1,10 @@
 {
     "tokenizer_class": "LlamaTokenizer",
-    "model_max_length": 2048,
+    "model_max_length": 4096,
     "padding_side": "left",
     "bos_token": "<s>",
     "eos_token": "</s>",
     "unk_token": "<unk>",
     "clean_up_tokenization_spaces": false,
     "special_tokens_map_file": "special_tokens_map.json"
-}
+}