README is misleading

[NoaHeinrich]

Because many of the examples in the README are surrounded in brackets, I had believed that the options in the yml file had to be in brackets too. This led to some quiet errors in CI that I did not notice for several weeks. Removing the brackets around examples like 'armor,color' could cut down on confusion.

[grische]

@NoaHeinrich what wording would you suggest? PRs to improve documentation are usually always welcome 🙂