use multi-line to avoid yaml parsing error

cookbook/pocketflow-workflow/nodes.py

@@ -16,17 +16,15 @@ Output the sections in YAML format as shown below:
 
 ```yaml
 sections:
-    - First section 
+    - |
-    - Second section
+        First section 
-    - Third section
+    - |
+        Second section
+    - |
+        Third section
 ```"""
         response = call_llm(prompt)
         yaml_str = response.split("```yaml")[1].split("```")[0].strip()
-        yaml_str = re.sub(
-            r'(?m)^(\s*)-\s*([^"\n]+)',
-            r'\1- "\2"',
-            yaml_str
-        )
         structured_result = yaml.safe_load(yaml_str)
         return structured_result