Fix chat_template

https://github.com/ochafik/minja/pull/7#issuecomment-3478459580

chat_template.jinja

@@ -118,7 +118,11 @@
             {%- endfor -%}
             
             {{- toolcall_end_token}}
-            {%- set last_tool_call.name = message.tool_calls[-1].name -%}
+            {%- if message.tool_calls[-1].function -%}
+                {%- set last_tool_call.name = message.tool_calls[-1].function.name -%}
+            {%- else -%}
+                {%- set last_tool_call.name = message.tool_calls[-1].name -%}
+            {%- endif -%}
         {%- else -%}
             {%- set last_tool_call.name = none -%}
         {%- endif -%}