Fix growroot playbook after ansible-lint changes

Author: Alex-Welsh

etc/kayobe/ansible/growroot.yml

@@ -31,6 +31,7 @@
   tasks:
     - name: Check LVM status
       ansible.builtin.shell:
+        executable: "/bin/bash"
         cmd: set -o pipefail && vgdisplay | grep -q lvm2
       changed_when: false
       failed_when: false