message: Update node memory utilization query
diff: @@ -67,7 +67,8 @@ const top25Queries = {
  const overviewQueries = {
  [OverviewQuery.MEMORY_TOTAL]: 'sum(node_memory_MemTotal_bytes)',
  - [OverviewQuery.MEMORY_UTILIZATION]: 'sum(node_memory_Active_bytes)',
  + [OverviewQuery.MEMORY_UTILIZATION]:
  + 'sum(node_memory_MemTotal_bytes - node_memory_MemAvailable_bytes)',
  [OverviewQuery.NETWORK_UTILIZATION]:
  'sum(instance:node_network_transmit_bytes_excluding_lo:rate1m+instance:node_network_receive_bytes_excluding_lo:rate1m)',
  [OverviewQuery.CPU_UTILIZATION]: 'cluster:cpu_usage_cores:sum',
  