Disable auto-self-update for rustup

See: rust-lang/rustup#3189

Author: hecrj

setup.sh

@@ -12,6 +12,7 @@ args=()
 # shellcheck disable=SC2206
 [[ -n "${INPUT_TARGETS}" ]] && args+=(-t "${INPUT_TARGETS// /}")
 
+rustup set auto-self-update disable
 rustup toolchain install "${INPUT_RUST_VERSION}" --profile "${INPUT_PROFILE}" "${args[@]}"
 rustup default "${INPUT_RUST_VERSION}"