sig-cluster-lifecycle/cluster-api: add chrischdi to maintainers

[chrischdi]

Adding myself to the approvers for cluster-api relevant staging images.

xref:

kubernetes-sigs/cluster-api#9997

/assign sbueringer

[ameukam]

No need to update the k8s.gcr.io path. We stopped to do promotions to k8s.gcr.io

[neolit123]

registry.k8s.io/images/k8s-staging-cluster-api/OWNERS

/approve

[sbueringer]

No need to update the k8s.gcr.io path. We stopped to do promotions to k8s.gcr.io

Makes sense. But should be fine either way I guess

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrischdi, neolit123

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• registry.k8s.io/images/k8s-staging-cluster-api/OWNERS [neolit123]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[chrischdi]

Removed from the old registry part (to get rid of do-not-merge/blocked-path).

[ameukam]

/lgtm

[sbueringer]

Removed from the old registry part (to get rid of do-not-merge/blocked-path).

Ah wasn't aware it's blocked on this level :D. Then it makes sense to not add yourself there of course