Update Ironbank

This MR contains the following updates:

Package	Update	Change
docker.io/grafana/loki-canary	patch	2.7.3 -> 2.7.4
ironbank/opensource/grafana/loki	patch	2.7.3 -> 2.7.4
registry1.dso.mil/ironbank/opensource/grafana/loki	patch	2.7.3 -> 2.7.4
registry1.dso.mil/ironbank/opensource/kubernetes/kubectl	patch	v1.26.1 -> v1.26.2
registry1.dso.mil/ironbank/opensource/nginx/nginx	patch	1.23.2 -> 1.23.3

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