fix linter

tasks/main.yml

 - name: install dropbear-initramfs
   apt:
-    pkg:
+    pkg: dropbear-initramfs
  
 - name: write config file for dropbear-initramfs
   notify: update initramfs
   template:
     src: config.j2
     dest: /etc/dropbear-initramfs/config
+    mode: 0644
+    owner: root
+    group: root
 
 - name: write authorized_keys file for dropbear-initramfs
   notify: update initramfs
   template:
     src: authorized_keys.j2
     dest: /etc/dropbear-initramfs/authorized_keys
+    mode: 0644
+    owner: root
+    group: root