Widget catalog has broken image URLs

[loic-sharma]

Page URL

https://docs.flutter.dev/ui/widgets/material2

Page source

No response

Describe the problem

The following widgets have broken images on the Material 2 catalog: https://docs.flutter.dev/ui/widgets/material2

• MaterialApp
• Scaffold
• DropdownButton
• TextButton
• ExpansionPanel
• SimpleDialog
• Stepper

Expected fix

No response

Additional context

No response

I would like to fix this problem.

• I will try and fix this problem on docs.flutter.dev.