fix(deps): update fluxcd dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	OpenSSF
github.com/fluxcd/kustomize-controller/api	require	patch	v1.6.0 -> v1.6.1
github.com/fluxcd/pkg/apis/meta	require	minor	v1.13.0 -> v1.21.0

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Release Notes

fluxcd/kustomize-controller (github.com/fluxcd/kustomize-controller/api)

v1.6.1

Compare Source

Changelog

v1.6.1 changelog

Container images

• docker.io/fluxcd/kustomize-controller:v1.6.1
• ghcr.io/fluxcd/kustomize-controller:v1.6.1

Supported architectures: linux/amd64, linux/arm64 and linux/arm/v7.

The container images are built on GitHub hosted runners and are signed with cosign and GitHub OIDC.
To verify the images and their provenance (SLSA level 3), please see the security documentation.

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: go.sum

Command failed: go get -t ./...
go: module github.com/fluxcd/pkg/apis/[email protected] requires go >= 1.25.0; switching to go1.25.1
go: downloading go1.25.1 (linux/amd64)
go: download go1.25.1: golang.org/[email protected]: verifying module: checksum database disabled by GOSUMDB=off