Setting legacy to false

Changed the tokenizer config by setting the legacy boolean value to false.

tokenizer_config.json

@@ -942,7 +942,7 @@
   "do_lower_case": true,
   "eos_token": "</s>",
   "extra_ids": 100,
-  "legacy": true,
+  "legacy": false,
   "model_max_length": 1000000000000000019884624838656,
   "pad_token": "<pad>",
   "padding": true,