Fix task and add LibreOffice

roles/arch/tasks/packages-gui.yml

@@ -5,7 +5,7 @@
     upgrade: yes
 - name: Install GUI packages
   become: true
-  dnf:
+  pacman:
     name: '{{ packages }}'
     state: present
     update_cache: yes
@@ -17,6 +17,8 @@
       - galculator
       - gvim
       - libgnome-keyring
+      - libreoffice-fresh
+      - libreoffice-fresh-en-gb
       - nextcloud-client
       - remmina
       - rxvt-unicode