fix anchor (#687)

Author: tastelikefeet

docs/source/LLM/Benchmark.md

@@ -703,6 +703,7 @@ swift sft \
         <td>27.74</td>
     </tr>
 </table>
+
 ## Tuners
 
 | exp_name | model_type | dataset | ms-bench mix ratio | tuner | tuner_params | trainable params(M) | flash_attn | gradient_checkpointing | hypers | memory | train speed(samples/s) | infer speed(tokens/s) | train_loss | eval_loss | gsm8k weighted acc | arc weighted acc | ceval weighted acc |