Flutter 1.20.4 hotfix released to the stable channel

[NewsBot]

A new Flutter blog post/annoucement has been posted!

Hi, Flutter 1.20.4 has been released to stable. This is a hotfix release on the 1.20 branch. Changes for this build are listed below and are available on the Flutter Wiki here: Hotfixes to the Stable Channel. This fixes the following issues: - https://github.com/flutter/flutter/iss

Get the full details here: https://groups.google.com/d/msg/flutter-announce/7Zr-gHgVVxw/3dVPzjw-BQAJ