Note that this isn’t an official Sponge project, but a personal one.
I recently wrote a Github action for uploading plugins to Ore to help me automate uploading releases of Nucleus via the Ore V2 API.
For examples of how you can make use of this, I have a test workflow file at test-plugin/ci.yml at api-8 · dualspiral/test-plugin · GitHub, and I use it in Nucleus at Nucleus/deployToOre.yml at v3 · NucleusPowered/Nucleus · GitHub. Please make sure you read the README for the action itself for how the inputs fit together.
Please feel free to make use of this if you’ll find it useful.