I miss-copied it from the link, it should be 22.28 Gbit/s. And your answer also matches 17.82 × 1.25 = 22.28.
To confirm, regardless of whether the color depth is 8 bit, 10 bit, or 12 bit, HDMI before 2.1 would break it into 8 bit blocks and transform them into 10-bit sequences. So, we always...