CI: attemp to fix `rustfmt-preview` error
The following error happens today:
$ rustup component add rustfmt-preview
error: component 'rustfmt' for target 'x86_64-unknown-linux-gnu' is unavailable for download
I first though this was due to rustfmt-preview
being renamed as rustfmt
since it was released as stable, but it ends up being a temporary error since even rustfmt
is unavailable for download too.
Stable branch can't be used here because of the IgnoreList
being used to preserve auto-generated files.
Closing this MR.
Edited by François Laignel