update comment struct

md/es.go

@@ -208,7 +208,7 @@ const EggFriendCircleCommentEsMapping = `
 				"type": "keyword"
 			},
 			"reply_comment_id":{
-				"type": "integer"
+				"type": "keyword"
 			},
 			"content":{
 				"type": "keyword"