Fix pad/blank token (capture tokenizer_config pad_token)

hf_community__joefox__tts_vits_ru_hf/config.json

@@ -64,8 +64,8 @@
     "<unk>": 41,
     "<pad>": 42
   },
-  "pad": "_",
-  "blank": "_",
+  "pad": "<pad>",
+  "blank": "<pad>",
   "bos": "^",
   "eos": "$",
   "add_blank_char": true,