Update data.json

docs/data.json

@@ -1,5 +1,13 @@
 {
   "update": [
+    {
+      "version": "2018-08-15",
+      "level": "Important",
+      "title": "Update at 2018-08-15",
+      "details": [
+        "<span style=\"color:  red;\">Fix some vulnerabilities, by @andyliu24 @plusls</span>"
+      ]
+    },
     {
       "version": "2018-07-15",
       "level": "Recommend",
@@ -65,4 +73,4 @@
       ]
     }
   ]
-}
+}