Update tokenizer_config.json

tokenizer_config.json

@@ -2,6 +2,7 @@
   "tokenizer_class": "custom_tokenizer.CustomSMILESTokenizer",
   "model_max_length": 140,
   "auto_map": {
-    "AutoTokenizer": "kelu01/Chem_Fuser--custom_tokenizer.CustomSMILESTokenizer"
+    "AutoTokenizer": "kelu01/Chem_Fuser--custom_tokenizer.CustomSMILESTokenizer",
+    "Autoconfig": "BertConfig"
   }
 }