Update readme.md (#13148)

Author: wu-sheng

docs/en/swip/readme.md

@@ -72,6 +72,7 @@ Next SWIP Number: 9
 
 ### Accepted SWIPs
 
+- [SWIP-8 Support Kong Monitoring](SWIP-8.md)
 - [SWIP-6 Support ActiveMQ Monitoring](SWIP-6.md)
 - [SWIP-5 Support ClickHouse Monitoring](SWIP-5.md)
 - [SWIP-4 Support available layers of service in the topology](SWIP-4.md)