bring back the badge on Readme (#808)

Update README.md

Author: cocoindex-dev

README.md

@@ -18,7 +18,7 @@
 </div>
 
 <div align="center">
-<!--     <a href="https://trendshift.io/repositories/13939" target="_blank"><img src="https://trendshift.io/api/badge/repositories/13939" alt="cocoindex-io%2Fcocoindex | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/></a> -->
+    <a href="https://trendshift.io/repositories/13939" target="_blank"><img src="https://trendshift.io/api/badge/repositories/13939" alt="cocoindex-io%2Fcocoindex | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/></a>
 </div>