Improving yamllint configuration (#11389)

Signed-off-by: Bas Meijer <bas.meijer@enexis.nl>

tests/cloud_playbooks/roles/packet-ci/tasks/create-vms.yml

@@ -10,7 +10,7 @@
   file:
     path: "/tmp/{{ test_name }}"
     state: directory
-    mode: 0755
+    mode: "0755"
 
 - name: Template vm files for CI job
   set_fact:
@@ -45,6 +45,6 @@
   template:
     src: "inventory.j2"
     dest: "{{ inventory_path }}"
-    mode: 0644
+    mode: "0644"
   vars:
     vms: "{{ vm_ips }}"