Update class_diagram_generator.py

class_diagram_generator.py

@@ -10,6 +10,9 @@ def generate_class_diagram(json_input: str, output_format: str) -> str:
     Args:
         json_input (str): A JSON string describing the class diagram structure.
                           It must follow the Expected JSON Format Example below.
+                          
+        output_format (str): The output format for the generated diagram.
+                            Supported formats: "png" or "svg"
 
     Expected JSON Format Example:
     {