docs: added Write a Review link (#11313)

Author: juzhiyuan

README.md

@@ -42,6 +42,7 @@ The technical architecture of Apache APISIX:
 
 ## Community
 
+- [Kindly Write a Review](https://www.g2.com/products/apache-apisix/reviews)
 - Mailing List: Mail to [email protected], follow the reply to subscribe to the mailing list.
 - Slack Workspace - [invitation link](https://apisix.apache.org/slack) (Please open an [issue](https://apisix.apache.org/docs/general/submit-issue) if this link is expired), and then join the #apisix channel (Channels -> Browse channels -> search for "apisix").
 - ![Twitter Follow](https://img.shields.io/twitter/follow/ApacheAPISIX?style=social) - follow and interact with us using hashtag `#ApacheAPISIX`