feature: extend default card cache time to 6 hours (#3242)

* feature: extend default card cache time to 8 hours

* reduce to six hours

api/wakatime.js

@@ -43,7 +43,7 @@ export default async (req, res) => {
 
     let cacheSeconds = clampValue(
       parseInt(cache_seconds || CONSTANTS.CARD_CACHE_SECONDS, 10),
-      CONSTANTS.FOUR_HOURS,
+      CONSTANTS.SIX_HOURS,
       CONSTANTS.ONE_DAY,
     );
     cacheSeconds = process.env.CACHE_SECONDS