Deptrac stopped working

I get failures on the deptrac-job on gitlab-ci. I use the ohartl/deptrac-container for this job.

I guess the container runs php 8.1, but the version of deptrac in the container doesn't support php 8.1 yet. Not sure though; I'll have to look into this.

For the time being, I'll allow the deptrac job to fail.