Bug in changing Title persian(arabic) fonts in plotly.GO

[Kamyarbagha]

Hi, I've just wanted to change the title persian font of a graph object but this approach does not change anything at all.

fig.update_layout(barmode='group', xaxis_tickangle=-45 ,title={'y':0.98, 'x':0.5,
                    'text':f"فروش ماهانه <b>{symbol}</b>",'xanchor':'center', 'yanchor':'top',
                    'font':{'size':40, 'family':"Droid Sans"}}, bargroupgap=0.01, autosize=False, width=1280, height=720,
                    margin=dict(l=50,r=10,b=0,t=50), legend=dict(traceorder='normal', font={'size':15},orientation="h",yanchor="middle",y=-0.12,xanchor="auto",x=1),
                    yaxis_title='<b>فروش ماهانه (میلیاردتومان)</b>',font=dict(
        family="Arial",
        size=15
    ),template="plotly_dark")

with changing the title dict args font even Google standard arabic(persian) fonts does not change anything.