bib: Minor fixes

Signed-off-by: Michalis Kokologiannakis <mixaskok@gmail.com>
1 job for new-infr in 7 seconds (queued for 8 seconds)
Name Stage Failure
failed
check-bib Test

Skipping Git submodules setup
Executing "step_script" stage of the job script
Using docker image sha256:6f4986d78878699c680b97e3d7a2fd131bf4def477f1abad9a9edcb5d99cda3c for debian with digest debian@sha256:2906804d2a64e8a13a434a1a127fe3f6a28bf7cf3696be4223b06276f32f1f2d ...
$ ./check.sh
/builds/michalis/wmbib/sort.sh: 37: bibtool: not found
Input not sorted! Consider running 'sort.sh'
Cleaning up file based variables
ERROR: Job failed: exit code 1