Update Product Hunt link

Author: sheepzh

README.md

@@ -65,4 +65,4 @@ It's simple and much helpful!
 
 ## Thanks
 
-<a href="https://www.producteffectivehunt.com/posts/timer?utm_source=badge-featured&utm_medium=badge&utm_souce=badge-timer" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/featured.svg?post_id=303723&theme=light" alt="Timer - Count your browsing time and visits on every sites | Product Hunt" style="width: 250px; height: 54px;" width="250" height="54" /></a>
+<a href="https://www.producthunt.com/products/timer-relaunch?utm_source=badge-follow&utm_medium=badge&utm_souce=badge-timer&#0045;relaunch" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/follow.svg?product_id=497735&theme=light" alt="Timer&#0032;&#0040;relaunch&#0041; - Timer&#0032;is&#0032;one&#0032;browser&#0032;extension&#0032;to&#0032;stat&#0032;site&#0032;visits&#0032;and&#0032;time&#0046; | Product Hunt" style="width: 250px; height: 54px;" width="250" height="54" /></a>