Escape the special characters

Signed-off-by: wanjunlei <wanjunlei@kubesphere.io>

Author: wanjunlei

pkg/notify/notifier/feishu/feishu.go

@@ -14,6 +14,7 @@ import (
 	"github.com/go-kit/kit/log"
 	"github.com/go-kit/kit/log/level"
 	json "github.com/json-iterator/go"
+
 	"github.com/kubesphere/notification-manager/pkg/async"
 	"github.com/kubesphere/notification-manager/pkg/constants"
 	"github.com/kubesphere/notification-manager/pkg/controller"