Improving yamllint configuration (#11389)

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

test-infra/image-builder/roles/kubevirt-images/tasks/main.yml

@@ -4,14 +4,14 @@
   file:
     state: directory
     path: "{{ images_dir }}"
-    mode: 0755
+    mode: "0755"
 
 - name: Download images files
   get_url:
     url: "{{ item.value.url }}"
     dest: "{{ images_dir }}/{{ item.value.filename }}"
     checksum: "{{ item.value.checksum }}"
-    mode: 0644
+    mode: "0644"
   loop: "{{ images | dict2items }}"
 
 - name: Unxz compressed images
@@ -41,7 +41,7 @@
   template:
     src: Dockerfile
     dest: "{{ images_dir }}/Dockerfile"
-    mode: 0644
+    mode: "0644"
 
 - name: Create docker images for each OS
   command: docker build -t {{ registry }}/vm-{{ item.key }}:{{ item.value.tag }} --build-arg cloud_image="{{ item.key }}.qcow2" {{ images_dir }}