Fixed static analysis error (possibly a bug in Ansible?)

Author: blackandred

tasks/user.yml

@@ -55,7 +55,7 @@
 
 - name: Configure ZSH
  include: zsh.yaml
- when: "'zsh' in user_shell"
+ when: "'zsh' in (user.shell | default('/bin/zsh'))"
 
 - name: Configure SSH daemon
  include: ssh-daemon.yaml