[borgbackup_client] Add 'user:' in authorized_key

roles/borgbackup_client/tasks/main.yml

@@ -43,9 +43,10 @@
 
 - name: Add public key to remote
   delegate_to: "{{ borg_server_host }}"
-  become: "{{ borg_server_user }}"
+  become: true
   authorized_key:
     exclusive: false
+    user: "{{ borg_server_user }}"
     key: "{{ ssh_key.public_key }}"
     key_options: >-
       command="borg serve --restrict-to-path {{ borg_host_dir }},