如何使用回调函数(dash python)更改CardBody(html.H6)中的文本？

import dash
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = html.Div(
    children=[
        html.H1("Hello Dash"),
        html.Div(
            children=[
                html.Button("Click me", id="button"),
                html.Div(id="output")
            ]
        )
    ]
)

@app.callback(
    Output("output", "children"),
    [Input("button", "n_clicks")]
)
def update_output(n_clicks):
    if n_clicks is None:
        return ""
    else:
        return html.H6(f"Button clicked {n_clicks} times")

if __name__ == "__main__":
    app.run_server(debug=True)