Is anyone having issues with Kubernetes dashboards? Signoz receives metrics and logs from K8s, but when I import the JSON-formatted official K8s dashboard, I get this error next to the node and namespace dropdowns :`code: 47, message: Missing columns: '$k8s.cluster.name' while processing query: 'SELECT JSONExtractString(labels, 'k8s.node.name') AS

k8s.node.name

FROM signoz_metrics.distributed_time_series_v4_1day WHERE (metric_name = 'k8s.node.cpu.time') AND (JSONExtractString(labels, 'k8s.cluster.name') =

$k8s

.cluster.name) GROUP BY `k8s.node.name`', required columns: 'metric_name' 'labels' '$k8s.cluster.name', maybe you meant: 'metric_name' or 'labels'`