GH actions doesn't run if one-out-of-many commits has [skip ci]

[ComFreek]

The GH actions workflow file currently uses if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"`` to skip builds for commits that have [skip ci]` in them. (I added that some days ago.)

Problem: if you push multiple commits at once and only one of them has [skip ci] in it, no CI will run.
Probably trivial to fix, just replace commits.*.message somehow, I guess.