chore(deps): update module sigs.k8s.io/structured-merge-diff/v6 to v7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sigs.k8s.io/structured-merge-diff/v6	v6.4.2 → v7.0.0

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Release Notes

kubernetes-sigs/structured-merge-diff (sigs.k8s.io/structured-merge-diff/v6)

v7.0.0

Compare Source

• Updates to Go 1.27
• Switches from json-iterator serialization to stdlib json/v2 serialization

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[renovate]

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• The go directive was updated for compatibility reasons

Details:

Package	Change
go	1.26.0 -> 1.27