Change become arguments to boolean

Changed all 'become: ' values from 'yes' to 'true' to satisfy the schema
(and also make the lsp shut up).

roles/nextcloud/tasks/main.yml

@@ -7,7 +7,7 @@
       curl localhost:2019/id/{{ stack_name }}_upstream/
   register: result
   changed_when: (result.stdout | from_json) != (lookup('template', 'upstream.json.j2') | from_yaml)
-  become: yes
+  become: true
   notify: "update nextcloud upstream"
 
 - name: Ensure target directory exists
@@ -15,14 +15,14 @@
     path: "{{ nextcloud_upstream_file_dir }}"
     state: directory
     mode: '0755'
-  become: yes
+  become: true
   notify: "update nextcloud upstream"
 
 - name: Move webserver Caddyfile to target dir
   ansible.builtin.copy:
     src: "Caddyfile"
     dest: "{{ nextcloud_upstream_file_dir }}/Caddyfile"
-  become: yes
+  become: true
   notify: "update nextcloud upstream"
 
 - name: Deploy to swarm
@@ -32,7 +32,7 @@
     prune: yes
     compose:
       - "{{ stack_compose }}"
-  become: yes
+  become: true
   tags:
     - docker-swarm
   notify: "update nextcloud upstream"