Update gsoci.azurecr.io/giantswarm/k8s-sidecar Docker tag to v1.30.0 (#276)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

helm/grafana/values.yaml

@@ -768,7 +768,7 @@ grafana:
     image:
       registry: gsoci.azurecr.io
       repository: giantswarm/k8s-sidecar
-      tag: 1.28.4
+      tag: 1.30.0
       sha: ""
     imagePullPolicy: IfNotPresent
     resources: {}