Modernize (#7089)

Use
https://pkg.go.dev/golang.org/x/tools/gopls/internal/analysis/modernize
to update code to new style.

---------

Co-authored-by: Flc゛ <four_leaf_clover@foxmail.com>
Co-authored-by: Damien Mathieu <42@dmathieu.com>

log/logtest/recorder_test.go

@@ -157,7 +157,7 @@ func TestRecorderConcurrentSafe(t *testing.T) {
 
 	r := &Recorder{}
 
-	for i := 0; i < goRoutineN; i++ {
+	for range goRoutineN {
 		go func() {
 			defer wg.Done()