style: use 'true' instead of 'yes' for truthy value

tasks/configure_persistent_journald_logging.yml

@@ -6,7 +6,7 @@
     owner: "root"
     group: "root"
     mode: "0644"
-    create: "yes"
+    create: "true"
     state: present
     block: |
       # If "persistent", data will be stored preferably on disk, i.e. below the /var/log/journal hierarchy (which is created if needed), with a fallback to /run/log/journal (which is created if needed), during early boot and if the disk is not writable.