Update llama2-chat-format.json
diff --git a/training/formats/llama2-chat-format.json b/training/formats/llama2-chat-format.json
index 8f8f4e6b5a..5d43c59b90 100644
--- a/training/formats/llama2-chat-format.json
+++ b/training/formats/llama2-chat-format.json
@@ -1,4 +1,4 @@
 {
-    "modelanswer,userprompt,systemprompt": "<s>[INST] <<SYS>>\n%systemprompt%\n<</SYS>>\n\n%userprompt%[/INST] %modelanswer%</s>"
+    "modelanswer,userprompt,systemprompt": "<s>[INST] <<SYS>>\n%systemprompt%\n<</SYS>>\n\n%userprompt%[/INST] %modelanswer%</s>",
     "modelanswer,userprompt": "<s>[INST] <<SYS>>\n\n<</SYS>>\n\n%userprompt%[/INST] %modelanswer%</s>"
 }

added the missing comma

## Checklist:

- [ ] I have read the [Contributing guidelines](https://github.com/oobabooga/text-generation-webui/wiki/Contributing-guidelines).
