Update Ironbank to v2.8.2

This MR contains the following updates:

Package	Update	Change
docker.io/grafana/loki-canary	patch	2.8.0 -> 2.8.2
ironbank/opensource/grafana/loki	patch	2.8.0 -> 2.8.2
registry1.dso.mil/ironbank/opensource/grafana/loki	patch	2.8.0 -> 2.8.2

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