Add quote around file path

.gitlab-ci.yml

@@ -109,7 +109,7 @@ build_image:
     - 'sed -i -E "s/(user_register_app_key: ).*/\1\"${SELF_REG_APP_KEY}\"/" CRI_XCBC/group_vars/knightly'
     - 'sed -i -E "s/(celery_user_password: ).*/\1\"${CELERY_PASSWD}\"/" CRI_XCBC/group_vars/knightly'
     - 'sed -i -E "s/(username: ).*/\1\"acctsvc\"/" CRI_XCBC/group_vars/all'
-    - 'sed -i -E "s|(ssh_pub_key: ).*|\1\"{{ lookup(''file'', ${SSH_PUB_KEY}) }}\"|" CRI_XCBC/group_vars/all'
+    - 'sed -i -E "s|(ssh_pub_key: ).*|\1\"{{ lookup(''file'', ''${SSH_PUB_KEY}'') }}\"|" CRI_XCBC/group_vars/all'
     - packer validate openstack-ood
     - |
       if [ $CI_PIPELINE_SOURCE == 'merge_request_event' ]; then