typo: controller="scheduledbackup" not controller="scheduled-backup"

[ari-becker]

Various queries in the dashboard refer to controller="scheduledbackup". However the correct scraped label is scheduled-backup. This mismatch causes some of the panels in the out-of-the-box dashboard to show no data.

grafana-dashboards/charts/cluster/grafana-dashboard.json

Line 2412 in f45ea03

"expr": "clamp_max(max(controller_runtime_reconcile_total{namespace=~\"$operatorNamespace\", result=\"error\", controller=\"scheduledbackup\"}), 1)",