Fix typo in environment for cluster_id_2

Author: imforster

go/cluster_management/cmd/delete_multi_region/delete_multi_region.go

@@ -91,7 +91,7 @@ func main() {
 	region1 := util.GetEnvWithDefault("REGION_1", "us-east-1")
 	region2 := util.GetEnvWithDefault("REGION_2", "us-east-2")
 	clusterId1 := util.GetEnvWithDefault("CLUSTER_ID_1", "CLUSTER_ID_1")
-	clusterId2 := util.GetEnvWithDefault("CLUSTER_ID_1", "CLUSTER_ID_2")
+	clusterId2 := util.GetEnvWithDefault("CLUSTER_ID_2", "CLUSTER_ID_2")
 
 	err := DeleteMultiRegionClusters(
 		ctx,