Update config.json

Incremented vocab size due to [added](https://huggingface.co/Metin/Gemma-2-9b-it-TR-DPO-V1/blob/main/added_tokens.json) token.

config.json

@@ -30,5 +30,5 @@
   "torch_dtype": "bfloat16",
   "transformers_version": "4.45.2",
   "use_cache": true,
-  "vocab_size": 256000
+  "vocab_size": 256001
 }