change math/rand => math/rand/v2 in volume_layout.go where is a perfo… (#6006)

weed/topology/volume_layout.go

@@ -2,12 +2,13 @@ package topology
 
 import (
 	"fmt"
-	"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
-	"math/rand"
+	"math/rand/v2"
 	"sync"
 	"sync/atomic"
 	"time"
 
+	"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
+
 	"github.com/seaweedfs/seaweedfs/weed/storage/types"
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
@@ -304,7 +305,7 @@ func (vl *VolumeLayout) PickForWrite(count uint64, option *VolumeGrowOption) (vi
 		return 0, 0, nil, true, fmt.Errorf("%s", noWritableVolumes)
 	}
 	if option.DataCenter == "" && option.Rack == "" && option.DataNode == "" {
-		vid := vl.writables[rand.Intn(lenWriters)]
+		vid := vl.writables[rand.IntN(lenWriters)]
 		locationList = vl.vid2location[vid]
 		if locationList == nil || len(locationList.list) == 0 {
 			return 0, 0, nil, false, fmt.Errorf("Strangely vid %s is on no machine!", vid.String())