fix a wrong internal link in examples readme (#4512)

examples/README.md

@@ -14,7 +14,7 @@ use the latest and greatest features, and best practices.
 | [opentelemetry-web](opentelemetry-web/)          | Basic use of Tracing and Metrics in a Web application                                                                    | Beginner         |
 | [http](http/)                             | HTTP Instrumentation to automatically collect trace data and export them to the backend of choice                        | Intermediate     |
 | [https](https/)                           | HTTPS Instrumentation to automatically collect trace data and export them to the backend of choice                       | Intermediate     |
-| [grpc](grpc/)                             | gRPC Instrumentation to automatically collect trace data and export them to the backend of choice                        | Intermediate     |
+| [grpc](grpc-js/)                          | gRPC Instrumentation to automatically collect trace data and export them to the backend of choice                        | Intermediate     |
 | [otlp-exporter-node](otlp-exporter-node/) | This example shows how to use `@opentelemetry/exporter-otlp-http` to instrument a simple Node.js application             | Intermediate     |
 | [opentracing-shim](opentracing-shim/)     | This is a simple example that demonstrates how existing OpenTracing instrumentation can be integrated with OpenTelemetry | Intermediate     |
 | [esm-http-ts](esm-http-ts/)     | This is a simple example that demonstrates tracing HTTP request, with an app written in TypeScript and transpiled to ES Modules. | Intermediate     |