refactor: clean code

internal/pkg/core/uploader/providers/volcengine-cdn/volcengine_cdn.go

@@ -15,7 +15,7 @@ import (
 	ve "github.com/volcengine/volcengine-go-sdk/volcengine"
 
 	"github.com/usual2970/certimate/internal/pkg/core/uploader"
-	"github.com/usual2970/certimate/internal/pkg/utils/x509"
+	"github.com/usual2970/certimate/internal/pkg/utils/certs"
 )
 
 type VolcEngineCDNUploaderConfig struct {
@@ -49,7 +49,7 @@ func New(config *VolcEngineCDNUploaderConfig) (*VolcEngineCDNUploader, error) {
 
 func (u *VolcEngineCDNUploader) Upload(ctx context.Context, certPem string, privkeyPem string) (res *uploader.UploadResult, err error) {
 	// 解析证书内容
-	certX509, err := x509.ParseCertificateFromPEM(certPem)
+	certX509, err := certs.ParseCertificateFromPEM(certPem)
 	if err != nil {
 		return nil, err
 	}