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/monica/tasks/main.yml

@@ -23,7 +23,7 @@
       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 monica upstream"
 
 - name: Deploy to swarm
@@ -33,7 +33,7 @@
     prune: yes
     compose:
       - "{{ stack_compose }}"
-  become: yes
+  become: true
   tags:
     - docker-swarm
   notify: "update monica upstream"