fix template

3 jobs for new-cluster in 30 seconds (queued for 2 seconds)
Name Stage Failure
test-chart Test
$ helm lint helm-charts/
==> Linting helm-charts/
[INFO] Chart.yaml: icon is recommended
[ERROR] templates/deployment.yaml: unable to parse YAML: error converting YAML to JSON: yaml: invalid map key: map[interface {}]interface {}{".Values.mariadbUserSecrets":interface {}(nil)}

Error: 1 chart(s) linted, 1 chart(s) failed
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit code 1