ci: Use `dtolnay/rust-toolchain`, not `actions-rs`

rust-lang / rust-bindgen

Automatically generates Rust FFI bindings to C (and some C++) libraries.

https://rust-lang.github.io/rust-bindgen/

BSD 3-Clause "New" or "Revised" License

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Closed waywardmonkeys closed 2 days ago

waywardmonkeys commented 2 days ago

The actions-rs actions are not maintained (and haven't been for a long time). Some tests used dtolnay/rust-toolchain, so use it consistently.