make install-dev-tools failure

[jfldde]

Summary

make install-dev-tools fails due to an incompatibility between rustc and cargo-binstall versions

Steps to reproduce

1. Run make install-dev-tools

Expected Result

Install dependencies

Actual Result

make install-dev-tools
cargo install --locked dprint
    Updating crates.io index
     Ignored package `dprint v0.47.2` is already installed, use --force to override
cargo install cargo-llvm-cov
    Updating crates.io index
     Ignored package `cargo-llvm-cov v0.6.11` is already installed, use --force to override
cargo install cargo-hack
    Updating crates.io index
     Ignored package `cargo-hack v0.6.30` is already installed, use --force to override
cargo install cargo-udeps
    Updating crates.io index
     Ignored package `cargo-udeps v0.1.49` is already installed, use --force to override
cargo install flaky-finder
    Updating crates.io index
     Ignored package `flaky-finder v0.2.22` is already installed, use --force to override
cargo install cargo-nextest --locked
    Updating crates.io index
     Ignored package `cargo-nextest v0.9.72` is already installed, use --force to override
cargo install cargo-binstall
    Updating crates.io index
error: cannot install package `cargo-binstall 1.7.4`, it requires rustc 1.79.0 or newer, while the currently active rustc version is 1.78.0
`cargo-binstall 1.6.9` supports rustc 1.70.0
make: *** [install-dev-tools] Error 101

Additional Information

We could update rust-toolchain.toml channel to 1.79.0 (implies updating CIs as well) or simply pin cargo-binstall to 1.6.9

[eyusufatik]

let's go with cargo-binstall to 1.6.9

we had to pin rust to 1.78.0 bc it would change the risc0 method id