updated the renovate.json to fix missing chart

General MR

Summary

Fixes

• Fixed sidecar.image.registry incorrectly set to docker.io; corrected to registry1.dso.mil and split full registry path out of repository field
• Added # renovate: docker=... comments above all IronBank tag: fields in values.yaml
• Added a matching custom regex manager in renovate.json targeting chart/values.yaml to prevent future drift between Chart.yaml annotations and values.yaml image tags

Updates:

• registry1.dso.mil/ironbank/opensource/grafana/loki 3.6.7 -> 3.7.1
• registry1.dso.mil/ironbank/grafana/grafana-enterprise-logs v3.5.4 -> v3.6.5
• registry1.dso.mil/ironbank/ironbank/opensource/grafana/enterprise-logs-provisioner 3.5.4 -> 3.6.5
• registry1.dso.mil/ironbank/opensource/kubernetes/kubectl v1.33.6 -> v1.34.6
• registry1.dso.mil/ironbank/bigbang/grafana/loki-canary 3.5.5 -> 3.7.1
• registry1.dso.mil/ironbank/opensource/memcached/memcached 1.6.39 -> 1.6.41
• registry1.dso.mil/ironbank/kiwigrid/k8s-sidecar 1.30.9 -> 2.5.0

Relevant logs/screenshots

N/A

Linked Issue

Relates to #289 (closed)

Upgrade Notices

N/A

Closes #289 (closed)