Improving yamllint configuration (#11389)

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

roles/container-engine/gvisor/tasks/main.yml

@@ -13,7 +13,7 @@
   copy:
     src: "{{ item.src }}"
     dest: "{{ bin_dir }}/{{ item.dest }}"
-    mode: 0755
+    mode: "0755"
     remote_src: yes
   with_items:
     - { src: "{{ downloads.gvisor_runsc.dest }}", dest: "runsc" }