Update chat_template.jinja

chat_template.jinja

@@ -36,8 +36,9 @@
             {%- set reasoning_content = message.reasoning_content %}
         {%- else %}
             {%- if '</think>' in content %}
-                {%- set reasoning_content = content.split('</think>')[0].rstrip('\n').split('<think>')[-1].lstrip('\n') %}
-                {%- set content = content.split('</think>')[-1].lstrip('\n') %}
+                {%- set reasoning_content = (content.split('</think>')|first).rstrip('\n') %}
+                {%- set reasoning_content = (reasoning_content.split('<think>')|last).lstrip('\n') %}
+                {%- set content = (content.split('</think>')|last).lstrip('\n') %}
             {%- endif %}
         {%- endif %}
         {%- if loop.index0 > ns.last_query_index %}