feat: update grpc docs

Author: gperdomor

content/microservices/grpc.md

@@ -11,7 +11,7 @@ With the gRPC transporter, Nest uses `.proto` files to dynamically bind clients
 To start building gRPC-based microservices, first install the required packages:
 
 ```bash
-$ npm i --save grpc @grpc/proto-loader
+$ npm i --save @grpc/grpc-js @grpc/proto-loader
 ```
 
 #### Overview