Try workaround for failing Github actions.

[ClemensBuechner]

No description provided.

[FlorianPommerening]

Looks good so far but it seems we also need the workaround for clang-tidy used in the style tests.
I'd add the step here (without the "if" statement because this action doesn't use a matrix setup):
https://github.com/aibasel/downward/blob/main/.github/workflows/style.yml#L27

[ClemensBuechner]

Thanks @FlorianPommerening, now all checks passed. So when I merge this, would this be a commit with the "trivial" tag or should I open an issue for it?

[silvansievers]

I'd say this goes with "trivial" - it doesn't affect the planner itself.