The direction of the read path is reverse

https://github.com/skyzh/mini-lsm/blob/85de1c10c8bce53b221cc32a4bce9d8ff6169fee/mini-lsm-book/src/00-overview.md?plain=1#L55

In the read path which indicates "find from new to old", I suppose the arrow should point **from right to left**, since in the `Write Path` section, step2 writes the key-value pair to the right-most "Mem Table", and flush the left-most(oldest) one to the disk.