refactor: yml -> yaml

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

roles/reverse_proxy/handlers/main.yaml

@@ -0,0 +1,11 @@
+---
+- name: Restart caddy service
+  ansible.builtin.systemd:
+    name: caddy
+    state: restarted
+  become: true
+
+- name: Update apt cache
+  ansible.builtin.apt:
+    update_cache: true
+  become: true