replace io/ioutil

fixes golangci-lint errors

api/mirror.go

@@ -2,7 +2,6 @@ package api
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"sort"
@@ -488,7 +487,7 @@ func apiMirrorsUpdate(c *gin.Context) {
 							task.TempDownPath, e = pp.GenerateTempPath(task.File.Filename)
 						} else {
 							var file *os.File
-							file, e = ioutil.TempFile("", task.File.Filename)
+							file, e = os.CreateTemp("", task.File.Filename)
 							if e == nil {
 								task.TempDownPath = file.Name()
 								file.Close()