Prefer ansible_architecture over ansible_userspace_architecture

It appears that the ansible_userspace_architecture fact is undefined
in at least some cases now, and in any event ansible_architecture
gives the expected value.

tasks/compose_Amazon.yml

@@ -7,4 +7,4 @@
   ansible.builtin.get_url:
     dest: /usr/libexec/docker/cli-plugins/docker-compose
     mode: '0755'
-    url: https://github.com/docker/compose/releases/latest/download/docker-compose-{{ ansible_system }}-{{ ansible_userspace_architecture }}
+    url: https://github.com/docker/compose/releases/latest/download/docker-compose-{{ ansible_system }}-{{ ansible_architecture }}