fix: indent in kratos migration job template

[piotrmsc]

Before changes templating was failing if extra volumemounts are used with following error :

Error: YAML parse error on kratos/templates/job-migration.yaml: error converting YAML to JSON: yaml: line 69: did not find expected key Use --debug flag to render out invalid YAML

and rendered output was :

        volumeMounts:
          - name: kratos-config-volume
            mountPath: /etc/config
            readOnly: true
            - mountPath: /etc/xyz
              name: cert-volume
              readOnly: true

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