Supply-chain security hardening: - Pin all third-party GitHub Actions to exact commit SHAs. - Replace raw `cargo install` commands with `taiki-e/cache-cargo-install-action` using git commit pinning.
Supply-chain security hardening: - Pin all third-party GitHub Actions to exact commit SHAs. - Replace raw `cargo install` commands with `taiki-e/cache-cargo-install-action` using git commit pinning.