Update dependency kubernetes/kubernetes to v1.28.12

[gardener-ci-robot]

This PR contains the following updates:

Package	Update	Change
kubernetes/kubernetes	patch	v1.28.10 -> v1.28.12

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Release Notes

kubernetes/kubernetes (kubernetes/kubernetes)

### [`v1.28.12`](https://togithub.com/kubernetes/kubernetes/releases/tag/v1.28.12): Kubernetes v1.28.12 [Compare Source](https://togithub.com/kubernetes/kubernetes/compare/v1.28.11...v1.28.12) See [kubernetes-announce@](https://groups.google.com/forum/#!forum/kubernetes-announce). Additional binary downloads are linked in the [CHANGELOG](https://togithub.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.28.md). See [the CHANGELOG](https://togithub.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.28.md) for more details. ### [`v1.28.11`](https://togithub.com/kubernetes/kubernetes/releases/tag/v1.28.11): Kubernetes v1.28.11 [Compare Source](https://togithub.com/kubernetes/kubernetes/compare/v1.28.10...v1.28.11) See [kubernetes-announce@](https://groups.google.com/forum/#!forum/kubernetes-announce). Additional binary downloads are linked in the [CHANGELOG](https://togithub.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.28.md). See [the CHANGELOG](https://togithub.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.28.md) for more details.

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Configuration

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Release note:

`kubernetes/kubernetes` has been updated to `v1.28.12`. [Release Notes](https://togithub.com/kubernetes/kubernetes/releases/tag/v1.28.12)

[gardener-robot]

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