Merge branch 'fix-shellcheck' into 'master'

Fix shellcheck complains due to new version

See merge request !169
6 jobs for master in 32 minutes and 9 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Lint
passed #21853
shellcheck

00:00:19

passed #21854
shfmt

00:00:12

 
  Build
passed #21855
secure
build:secure

00:27:58

 
  Test
passed #21857
fast-single-thread
test-basic-qemu

00:03:19

passed #21858
fast-single-thread
test-cloudimg-qemu

00:03:46

passed #21856
test-vagrant-boxes-format

00:00:39