Update prompts.yaml

prompts.yaml

@@ -158,8 +158,8 @@ tools:
         ```tool
         convert_units(value=100, from_unit="F", to_unit="C")
         ```
-      tool_result: "100 F = 37.78 C"
-      assistant_final: "100 F = 37.78 C"
+      tool_result: "100 F = 37.78 C"  # Quoted string with no % or special char
+      assistant_final: "100 F = 37.78 C"  # Quoted string, ensures safe YAML parsing
 {%- for tool in tools.values() %}
 - {{ tool.name }}: {{ tool.description }}
     Takes inputs: {{tool.inputs}}