Fix Tokenizer Class

Huggingface's transformers class doesn't have BloomTokenizer, only BloomTokenizerFast (that's also used in AutoTokenizer).
https://github.com/huggingface/transformers/issues/18178
https://github.com/huggingface/transformers/pull/18005

tokenizer_config.json

@@ -5,6 +5,6 @@
   "eos_token": "</s>",
   "model_max_length": 1000000000000000019884624838656,
   "pad_token": "<pad>",
-  "tokenizer_class": "BloomTokenizer",
+  "tokenizer_class": "BloomTokenizerFast",
   "unk_token": "<unk>"
 }