update default mode in mergerfs disks

roles/mergerfs/tasks/disks.yml

@@ -5,10 +5,10 @@
     state: directory
     owner: "{{ item.owner | default('root') }}"
     group: "{{ item.group | default('root') }}"
-    mode: '0775'
+    mode: "{{ item.mode | default('0750') }}"
   with_items:
     - "{{ mergerfs_disks }}"
-    - "{{ fstab_mergerfs }}"
+    - "{{ mergerfs_fstab }}"
   loop_control:
     label: "{{ item.path }}"
   when:
@@ -37,7 +37,7 @@
     fstype: "{{ item.fs | default('fuse.mergerfs') }}"
     state: mounted
   with_items:
-    - "{{ fstab_mergerfs }}"
+    - "{{ mergerfs_fstab }}"
   loop_control:
     label: "{{ item.path }}"
   when: