Kanboard is pretty good, but doesn’t use git for storage.
Something like wiki.js or Dokuwiki might work, wiki.js uses git and Dokuwiki uses plaintext files.
If you’re using nextcloud already, Nextcloud Deck is pretty basic but works alright if you want a simple kanban board .
BookStack is also great for a wiki, but doesn’t use git.
Obsidian is really popular right now too and uses plain markdown files that you could manage with git
Lots of people do have telemetry disabled. Kinda disappointing to see it being used as a reason for removing functionality without research first