Modify comment syntax error (#2572)

core/utils/times.go

@@ -7,12 +7,12 @@ import (
 	"github.com/zeromicro/go-zero/core/timex"
 )
 
-// A ElapsedTimer is a timer to track the elapsed time.
+// An ElapsedTimer is a timer to track the elapsed time.
 type ElapsedTimer struct {
 	start time.Duration
 }
 
-// NewElapsedTimer returns a ElapsedTimer.
+// NewElapsedTimer returns an ElapsedTimer.
 func NewElapsedTimer() *ElapsedTimer {
 	return &ElapsedTimer{
 		start: timex.Now(),

core/utils/uuid.go

@@ -2,7 +2,7 @@ package utils
 
 import "github.com/google/uuid"
 
-// NewUuid returns a uuid string.
+// NewUuid returns an uuid string.
 func NewUuid() string {
 	return uuid.New().String()
 }