Fix glab zsh completion install on Debian

roles/glab/tasks/Debian.yaml

@@ -62,7 +62,13 @@
     state: absent
     path: '{{tempdir.path}}'
 
+- name: get zsh completions source
+  command: glab completion -s zsh
+  register: glab_zsh_completions
+  changed_when: false
+
 - name: install zsh completions
-  when: glab_version is not defined or glab_version != latest_version
-  command:
-    glab completion -s zsh > ~/.local/share/zsh/site-functions/_glab
+  become: true
+  copy:
+    content: '{{glab_zsh_completions.stdout}}'
+    dest: /usr/local/share/zsh/site-functions/_glab