chore: add and apply yamllint

ansible/k3s/roles/base/tasks/packages.yml

@@ -1,17 +1,18 @@
+---
 - name: Install base packages
   apt:
-    name: "{{ item }}"
-    state: present
-    update_cache: yes
+      name: '{{ item }}'
+      state: present
+      update_cache: true
   loop:
-    - qemu-guest-agent
-    - git
-    - tmux
-    - vim
-    - curl
-    - nfs-common
+      - qemu-guest-agent
+      - git
+      - tmux
+      - vim
+      - curl
+      - nfs-common
 
 - name: Update all packages
   apt:
-    upgrade: dist
-    update_cache: yes
+      upgrade: dist
+      update_cache: true