GitHub Command Line option opens bash, not zsh

[johnpryan]

Description

macOS uses zsh by default, so this displays a warning:

The default interactive shell is now zsh.
To update your account to use zsh, please run `chsh -s /bin/zsh`.
For more details, please visit https://support.apple.com/kb/HT208050.
bash-3.2$ 

It would be great if there was a way to configure the shell or use the system default.