maintainers/scripts/sha-to-sri: minor efficiency improvement of the `Nix32` decoder

    def decode(self, s: str):

        assert len(s) == self.length

        out = [0 for _ in range(self.n)]

        # TODO: Do better than a list of byte-sized ints

        out = bytearray(self.n)

        for n, c in enumerate(reversed(s)):

            digit = self.inverted[c]