fix(monitoring): Fix dashboard using interval instead of range

infrastructure/monitoring/dashboards/cluster-cpu-check.json

@@ -118,7 +118,7 @@
               "uid": "${DS_PROMETHEUS}"
             },
             "editorMode": "code",
-            "expr": "avg(avg_over_time(node_hwmon_power_average_watt[$__interval]))",
+            "expr": "avg(avg_over_time(node_hwmon_power_average_watt[$__range]))",
             "instant": false,
             "legendFormat": "__auto",
             "range": true,
@@ -579,4 +579,4 @@
     "uid": "ab765508-9634-48d4-93b8-bd6f2e24ac05",
     "version": 5,
     "weekStart": ""
-  }
+  }
\ No newline at end of file