fix: db.js expire server stats comment typo (#6633)

db.js

@@ -30,7 +30,7 @@ module.exports.CreateDB = function (parent, func) {
     var Datastore = null;
     var expireEventsSeconds = (60 * 60 * 24 * 20);              // By default, expire events after 20 days (1728000). (Seconds * Minutes * Hours * Days)
     var expirePowerEventsSeconds = (60 * 60 * 24 * 10);         // By default, expire power events after 10 days (864000). (Seconds * Minutes * Hours * Days)
-    var expireServerStatsSeconds = (60 * 60 * 24 * 30);         // By default, expire power events after 30 days (2592000). (Seconds * Minutes * Hours * Days)
+    var expireServerStatsSeconds = (60 * 60 * 24 * 30);         // By default, expire server stats after 30 days (2592000). (Seconds * Minutes * Hours * Days)
     const common = require('./common.js');
     const path = require('path');
     const fs = require('fs');