This upgrade makes it possible to pre-compute a Bootsnap cache for a
containerized system, since the `ruby_platform` header is no longer
dependent on `uname -v`--which changes depending on the host kernel--but
rather on the glibc version:
https://github.com/Shopify/bootsnap/pull/283

Full list of changes:
https://github.com/Shopify/bootsnap/compare/v1.4.5..v1.4.6