DEV-769: fixed typo for linter

roles/postgres/tasks/main.yml

@@ -30,7 +30,7 @@
     lvm_with_hetzner_volumes__volprefix: "postgres-backup"
     lvm_with_hetzner_volumes__volsize: "{{ postgres_backup_volume_size }}"
     lvm_with_hetzner_volumes__volcount: "{{ postgres_backup_volume_count }}"
-    lvm_with_hetzner_volumes__mountpath: "{{ backup_directory}}"
+    lvm_with_hetzner_volumes__mountpath: "{{ backup_directory }}"
   when: server_type == "master"
   args:
     apply: