fix(deps): update module github.com/kcp-dev/kcp/sdk to v0.28.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/kcp-dev/kcp/sdk	v0.28.0 -> v0.28.1

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Release Notes

kcp-dev/kcp (github.com/kcp-dev/kcp/sdk)

v0.28.1

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Changes by Kind

Bug or Regression

• Fix APIBinding admission mishandling v1alpha1 API version. This fixes the bug where it was impossible to apply v1alpha1 APIBindings (#​3544, @​xmudrii)
• Stop printing Ready column for APIExports as virtual workspace URLs are no longer populated by default (#​3493, @​embik)
• Fix CRDs with kind Cluster leading to errors and fix URLs with multiple /cluster/... segments being silently ignored (#​3548, @​ntnn)
• Fix create-workspace on an existing workspace throwing a panic (#​3524, @​ntnn)
• Fix kubectl kcp bind command after verbs permission claims migration (#​3531, @​mjudeikis)
• Fix permission claim controller hot loop when claiming events in an APIExport (#​3503, @​mjudeikis)
• The kcp kubectl plugin now supports kcp <0.28 again. In kcp 0.28+, kubectl kcp claims get apibinding now shows the permission claim verbs (#​3541, @​xrstf)

Dependencies

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Removed

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