Try and fix seqtk version collection in unit test

.gitlab-ci.yml

@@ -194,7 +194,7 @@ downsampleData:
     - merge_requests
     - schedules
   script:
-  - singularity run 'docker://gudmaprbk/seqtk1.3:1.0.0' seqtk 2>&1 | grep -o Version.* > version_seqtk.txt
+  - singularity run 'docker://gudmaprbk/seqtk1.3:1.0.0' seqtk 2>&1 > /dev/null | grep -o Version.* > version_seqtk.txt
   - singularity run 'docker://gudmaprbk/seqtk1.3:1.0.0' seqtk sample -s100 ./test_data/fastq/small/Q-Y5F6_1M.se_trimmed.fq.gz 1000 1> sampled.1.fq
   - pytest -m downsampleData
   artifacts: