fix: arch discovery

refactor repository steps following official docker installation steps

roles/docker/tasks/main.yml

@@ -22,15 +22,18 @@
     mode: "0644"
   become: true
 
+- name: Get system architecture
+  ansible.builtin.command: dpkg --print-architecture
+  register: dpkg_architecture
+  changed_when: false
+  become: true
+
 - name: Add Docker official APT repository
   ansible.builtin.apt_repository:
-    repo: >-
-      deb [arch={{ ansible_pkg_arch }} signed-by=/etc/apt/keyrings/docker.asc]
-      https://download.docker.com/linux/{{ ansible_distribution | lower }}
-      {{ ansible_distribution_release }} stable
+    repo: "deb [arch={{ dpkg_architecture.stdout }} signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} stable"
     state: present
     filename: docker
-    update_cache: true
+    update_cache: yes
   become: true
 
 - name: Install modern Docker CE packages