Update Ironbank

This MR contains the following updates:

Package	Update	Change
docker.io/grafana/loki-canary	patch	2.9.3 -> 2.9.4
ironbank/opensource/grafana/loki	patch	2.9.3 -> 2.9.4
registry1.dso.mil/ironbank/kiwigrid/k8s-sidecar	patch	1.25.2 -> 1.25.3
registry1.dso.mil/ironbank/opensource/grafana/loki	patch	2.9.3 -> 2.9.4
registry1.dso.mil/ironbank/opensource/kubernetes/kubectl	patch	v1.28.4 -> v1.28.6

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