feat: point AutoTokenizer to VoxCPM2Tokenizer via auto_map

tokenizer_config.json

@@ -97,7 +97,7 @@
       "rstrip": false,
       "single_word": false,
       "special": true
-    },   
+    },
     "110": {
       "content": "<|/speaker_id|>",
       "lstrip": false,
@@ -205,8 +205,14 @@
   "pad_token": null,
   "sp_model_kwargs": {},
   "spaces_between_special_tokens": false,
-  "tokenizer_class": "LlamaTokenizer",
+  "tokenizer_class": "VoxCPM2Tokenizer",
   "unk_token": "<unk>",
   "use_default_system_prompt": false,
-  "chat_template": "{% for message in messages %}{{'<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>' + '\n'}}{% endfor %}{% if add_generation_prompt %}{{ '<|im_start|>assistant\n' }}{% endif %}"
+  "chat_template": "{% for message in messages %}{{'<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>' + '\n'}}{% endfor %}{% if add_generation_prompt %}{{ '<|im_start|>assistant\n' }}{% endif %}",
+  "auto_map": {
+    "AutoTokenizer": [
+      "tokenization_voxcpm2.VoxCPM2Tokenizer",
+      null
+    ]
+  }
 }