Fix more yamllint errors

Signed-off-by: Noah Knegt <git@noahknegt.com>

roles/setup/handlers/main.yml

@@ -10,7 +10,7 @@
 ---
 - name: apt_update
   apt:
-    update_cache: yes
+    update_cache: true
 
 - name: restart_sshd
   service:

roles/setup/tasks/system/openssh.yml

@@ -19,7 +19,7 @@
   service:
     name: "{{ openssh_service }}"
     state: started
-    enabled: yes
+    enabled: true
 
 - name: configure sshd
   template:

roles/setup/tasks/users/ansible.yml

@@ -38,7 +38,7 @@
     group: ansible
     mode: 0700
   with_items:
-    - { dir: /home/ansible/.ssh }
+    - dir: /home/ansible/.ssh
 
 - name: Copy ssh public key
   authorized_key: