How to update unofficial app (synapse)

synapse/matrix is the only not official app i use, i have to do something more to update or it just update automatically as other apps?

Synapse is official and in the official list, see : [Official app] Synapse
sudo yunohost app upgrade synapse is enough I think.

To update an unofficial apps, do the command in a terminal :
sudo yunohost app upgrade name-of-the-application -u repos-on-github

When i installed yuno few week ago i did not found synapse inside the official list on the web interface could i forgot something? I clicked on install apps but synapse wasn’t there so i used github

I was integrated in the official list a few days ago (the exact date is somewhere is this forum)