testing/ruff: upgrade to 0.0.247
RUSTUP_TOOLCHAIN=system
is necessary for systems where rustup is
installed. Rustup will use its own binaries which don't include the
x86_64-alpine-linux-musl
target.
RUSTUP_TOOLCHAIN=system
is necessary for systems where rustup is
installed. Rustup will use its own binaries which don't include the
x86_64-alpine-linux-musl
target.