docs: Remove cache: true from setup-pixi

[pavelzw]

This is the default now and doesn't need to be specified

[baszalmstra]

Amazing as always! 🥇

Thanks!

[pavelzw]

I think it would also make sense to briefly mention the github action on pixi.sh. Any suggestions on which page to put it in?

[pavelzw]

How about in Basic Usage?

[baszalmstra]

Perhaps as an example? @ruben-arts WDYT?

[pavelzw]

I'm also thinking of just mirroring the complete README.md from setup-pixi and adding a

- [ ] updated readme for pixi.sh

in the pull request template of setup-pixi.
This might make for a better docs experience overall...

[pavelzw]

I think polarify has a nice GHA integration. I could also add it as an example and describe what's happening under the hood a bit more.

[ruben-arts]

Yeah we would love the setup-pixi docs to be integrated in pixi.sh we also want to do this for pixi-docker.
Could have it's own page, and be added in the navigation. Then we can link to it from the basic usage.
Multiple examples would always help!