Fix linter

Author: vitalyisaev2

internal/pool/pool.go

@@ -7,8 +7,8 @@ import (
 	"time"
 
 	"github.com/jonboulle/clockwork"
-
 	"github.com/ydb-platform/ydb-go-genproto/protos/Ydb"
+
 	"github.com/ydb-platform/ydb-go-sdk/v3/internal/endpoint"
 	"github.com/ydb-platform/ydb-go-sdk/v3/internal/stack"
 	"github.com/ydb-platform/ydb-go-sdk/v3/internal/xcontext"