ci: switch to dtolnay/rust-toolchain #883
Merged
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The actions-rs/toolchain we were using appears dead:
actions-rs/toolchain#216
Here's dtolnay's take: https://github.com/dtolnay/rust-toolchain
In particular, it looks like a much more maintainable path here. For
this one, if it ever goes unmaintained, I can maintain it myself without
too much fuss.
See also: https://old.reddit.com/r/rust/comments/vyx4oj/actionsrs_organization_became_unmaintained/ig54zv7/