Renovate: Update github.com/ironcore-dev/metal-maintenance-operator digest to 3168ef7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/ironcore-dev/metal-maintenance-operator	require	digest	5a49e75 → 3168ef7

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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):

• 5 additional dependencies were updated
• The go directive was updated for compatibility reasons

Details:

Package	Change
go	1.26 -> 1.26.3
k8s.io/api	v0.36.1 -> v0.36.3
k8s.io/apimachinery	v0.36.1 -> v0.36.3
k8s.io/client-go	v0.36.1 -> v0.36.3
golang.org/x/oauth2	v0.34.0 -> v0.36.0
k8s.io/apiextensions-apiserver	v0.36.1 -> v0.36.3