@Override
    public void update(final byte in) {
      checkSize(1);
      buffer[bufferPos] = in;
      bufferPos++;
      maybeInitialize();
    }
update the message digest with a single byte.

@param in the input byte to be entered.
crypto/algorithms/src/main/java/org/hyperledger/besu/crypto/Blake2bfMessageDigest.java