Use 5minute lts data in history graphs

src/panels/history/ha-panel-history.ts

@@ -315,7 +315,7 @@ class HaPanelHistory extends LitElement {
       this._startDate,
       this._endDate,
       statisticIds,
-      "hour",
+      "5minute",
       undefined,
       ["mean", "state"]
     );

src/panels/lovelace/cards/hui-history-graph-card.ts

@@ -169,7 +169,7 @@ export class HuiHistoryGraphCard extends LitElement implements LovelaceCard {
       start,
       now,
       this._entityIds,
-      "hour",
+      "5minute",
       undefined,
       ["mean", "state"]
     );