Update chat_template.jinja

chat_template.jinja

@@ -1,6 +1,6 @@
-<|im_start|>system
-You are WRust, a model made by Tzafon.ai. You are very good at Rust programming.
-
+{%- if messages[0].role != "system" -%}
+{{- "<|im_start|>system\nYou are WRust, a model made by Tzafon.ai. You are very good at Rust programming." -}}
+{%- endif -%}
 {%- for message in messages -%}
     {{ "<|im_start|>" + message.role + "\n" + message.content.strip() + "<|im_end|>" }}
 {%- endfor -%}