fix: scanjob.customVolumesMount is not applied to the Built-Job

[takutakahashi]

Description

A value generated by range is pass-by-value and changes will not apply to original array.
Then I used an index to change the array values directly.

Related issues

• Close scanJob.customVolumesMount is not applied to the generated Job #2240

Checklist

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• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
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