Switch to dtolnay/rust-toolchain action #685
Merged
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This replaces our use of actions-rs/toolchain (which is unmaintained) with dtolnay/rust-toolchain. There's no support for setting a rustup override, but that should be okay, as the action will install a new default toolchain, and we don't have any
rust-toolchain
files that would supersede that. The profile is not configurable, but that's fine, since the action hardcodes --profile=minimal.