fix: errors in otomi-db chart

[CasLubbers]

Enabling backups with s3 configured resulted in the following errors:

in helmfile.d/helmfile-04.databases.yaml: command "/opt/homebrew/bin/helm" exited with non-zero status:

PATH:
  /opt/homebrew/bin/helm

ARGS:
  0: helm (4 bytes)
  1: --kube-context (14 bytes)
  2: otomi-eks-demo (14 bytes)
  3: template (8 bytes)
  4: harbor-otomi-db (15 bytes)
  5: ../charts/otomi-db (18 bytes)
  6: --namespace (11 bytes)
  7: harbor (6 bytes)
  8: --values (8 bytes)
  9: /var/folders/2m/5h7k3bvx20df649hd70d5j400000gq/T/helmfile3969984297/harbor-harbor-otomi-db-values-5594bdc98 (107 bytes)
  10: --skip-tests (12 bytes)

ERROR:
  exit status 1

EXIT STATUS
  1

STDERR:
  Error: YAML parse error on otomi-db/templates/cluster.yaml: error converting YAML to JSON: yaml: line 30: mapping values are not allowed in this context
  Use --debug flag to render out invalid YAML

COMBINED OUTPUT:
  Error: YAML parse error on otomi-db/templates/cluster.yaml: error converting YAML to JSON: yaml: line 30: mapping values are not allowed in this context
  Use --debug flag to render out invalid YAML

Running otomi template -l name=harbor-otomi-db now works with backups for s3 enabled

[j-zimnowoda]

I confirm that it renders correctly now.