config: adjust vocab size (slightly larger than mT5)

config.json

@@ -1,4 +1,5 @@
 {
+  "_name_or_path": "./",
   "architectures": [
     "T5ForConditionalGeneration"
   ],
@@ -23,7 +24,8 @@
   "relative_attention_num_buckets": 32,
   "tie_word_embeddings": false,
   "tokenizer_class": "T5Tokenizer",
+  "torch_dtype": "float32",
   "transformers_version": "4.27.4",
   "use_cache": true,
-  "vocab_size": 250112
+  "vocab_size": 256384
 }