grpc is not generic in micro, so name component as rpc

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

main.go

@@ -45,7 +45,7 @@ func (g *Generator) Generate(plugin *protogen.Plugin) error {
 		case "http":
 			err = g.httpGenerate(component, plugin)
 		case "grpc", "rpc":
-			err = g.rpcGenerate(component, plugin)
+			err = g.rpcGenerate("rpc", plugin)
 		case "gorilla":
 			err = g.gorillaGenerate(component, plugin)
 		case "chi":