An autistic approach to installing YunoHost. (Warning - lots of graphics)

I just did the sudo apt update command as recommended by Aleks in this announcement on the forums. It looks like it wants me to upgrade from YNH v4.1.7.2 to v4.3.4.2. Is this what I need to be doing first? I thought v4.1.7.2 is the latest version for the Raspberry Pi?