update maintenance window type to match DB model

server/src/types/maintenanceWindow.ts

@@ -3,7 +3,7 @@ export type DurationUnit = (typeof DurationUnits)[number];
 
 export interface MaintenanceWindow {
 	id: string;
-	monitorId: string;
+	monitorIds: string[];
 	teamId: string;
 	active: boolean;
 	name: string;