How to update my Interactive_3D_Surface_Plot plugin in Fiji

Hello,

in the past I did send my plugins to Wayne, then I used github.
But I am not really sure what to do when I have updated a plugin.

For example I updated GitHub - fiji/Interactive_3D_Surface_Plot
quite a while ago, but it was not included in Fiji.

Am I missing something or what do I need to do when I have an updated version of a plugin.
Maybe this is written somewhere but I did not find it.

Thank you
Kai