added karate example under testing

readme.md

@@ -121,6 +121,7 @@
 
 - [ghz](https://github.com/bojand/ghz) - Simple gRPC benchmarking and load testing tool inspired by hey and grpcurl.
 - [gatling-grpc](https://github.com/phiSgr/gatling-grpc) - A [Gatling](http://gatling.io/) stress test plugin for gRPC.
+- [karate-grpc](https://github.com/karatelabs/karate-examples/blob/main/grpc) - Example of using [Karate](https://github.com/karatelabs/karate) to integrate and test gRPC.
 - [strest-grpc](https://github.com/BuoyantIO/strest-grpc) - A load tester for stress testing grpc intermediaries.
 - [hazana](https://github.com/emicklei/hazana) - A Go package for creating load test tooling. Supports gRPC.
 - [fortio](https://github.com/fortio/fortio) - A microservices (http, grpc) load testing library and tool from Istio project.