lint: adjust two task names to fix name[template]

Using templates anywhere but the end of the name makes grepping for
errors more difficult.

roles/hetzner_storagebox/tasks/upload_client_authorized_keys.yml

@@ -2,7 +2,7 @@
   template: src=authorized_keys_client.j2 dest={{ tempfile.path }} mode=preserve
   no_log: true
 
-- name: Upload authorized_keys file to {{ backup_dir }}/{{ item.item }}
+- name: Upload authorized_keys file for {{ item.item }}
   expect:
     command: |
       bash -c 'sftp {{ storagebox_username }}@{{ storagebox_hostname }} <<EOF

roles/rebuilderd/tasks/main.yml

@@ -25,6 +25,6 @@
 - name: Enable and start rebuilderd
   systemd: name=rebuilderd enabled=yes state=started
 
-- name: Enable and start rebuilderd {{ item }} timer
+- name: Enable and start rebuilderd-sync timer for {{ item }}
   systemd: name=rebuilderd-sync@archlinux-{{ item }}.timer enabled=yes state=started
   with_items: "{{ suites }}"