Update chat_template.jinja

I think there's only two \n at the end.

```
suffix = "<|im_end|>\n<|im_start|>assistant\n<think>\n\n</think>\n\n"
```

chat_template.jinja

@@ -9,4 +9,3 @@ Judge whether the Document meets the requirements based on the Query and the Ins
 
 </think>
 
-