[Kotlin-Spring] fix arrays response api after generation

[Lezenford]

PR checklist

To fix #16295

[wing328]

please follow step 3 in the PR checklist to update the samples so that the CI can test the change.

[wing328]

Thanks for the PR but your commit (as shown in the Commits tab) is not linked to your Github account, which means this PR won't count as your contribution in https://github.com/OpenAPITools/openapi-generator/graphs/contributors.

Let me know if you need help fixing it.

Ref: https://github.com/OpenAPITools/openapi-generator/wiki/FAQ#how-can-i-update-commits-that-are-not-linked-to-my-github-account

[wing328]

samples not yet up-to-date: https://github.com/OpenAPITools/openapi-generator/actions/runs/5830122867/job/15895787232?pr=16296

[wing328]

cc @jimschubert (2017/09) ❤️, @dr4ke616 (2018/08) @karismann (2019/03) @Zomzog (2019/04) @andrewemery (2019/10) @4brunu (2019/11) @yutaka0m (2020/03) @stefankoppier (2022/06)

[Lezenford]

fix other samples.

What I need to fix problem with my comment? all of them from my fork repository