refactor: yml -> yaml

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/common/tasks/hostname.yaml

@@ -0,0 +1,14 @@
+---
+- name: Set a hostname
+  ansible.builtin.hostname:
+    name: "{{ inventory_hostname }}"
+  become: true
+
+- name: Update /etc/hosts to reflect the new hostname
+  ansible.builtin.lineinfile:
+    path: /etc/hosts
+    regexp: '^127\.0\.1\.1'
+    line: "127.0.1.1 {{ inventory_hostname }}"
+    state: present
+    backup: true
+  become: true