when updating mods with cron, pass the git ref to update from

kif_minetest_server/tasks/install_mods.yml

@@ -23,7 +23,7 @@
 - name: Create cron job to automatically update mods
   ansible.builtin.cron:
     name: KIF minetest update mods
-    job: "cd {{ minetest_base_dir }}/minetest_mods && ./update.sh && systemctl restart minetest"
+    job: "cd {{ minetest_base_dir }}/minetest_mods && ./update.sh \"{{ mods_version }}\" && systemctl restart minetest"
     minute: "56"
     hour: "03"
   become: true