reference tutorials

Author: glbrntt

README.md

@@ -4,6 +4,8 @@ This repository contains integrations with [SwiftProtobuf][gh-swift-protobuf]
 for [gRPC Swift][gh-grpc-swift-protobuf].
 
 - 📚 **Documentation** is available on the [Swift Package Index][spi-grpc-swift-protobuf]
+- 🎓 **Tutorials** are available in the documentation for `grpc/grpc-swift` on
+  the [Swift Package Index][spi-grpc-swift].
 - 💻 **Examples** are available in the `Examples` directory of the
   [`grpc/grpc-swift`](https://github.com/grpc/grpc-swift) repository
 - 🚀 **Contributions** are welcome, pleasee see [CONTRIBUTING.md](CONTRIBUTING.md)
@@ -12,4 +14,5 @@ for [gRPC Swift][gh-grpc-swift-protobuf].
 
 [gh-swift-protobuf]: https://github.com/apple/swift-protobuf
 [gh-grpc-swift-protobuf]: https://github.com/grpc/grpc-swift-protobuf
+[spi-grpc-swift]: https://swiftpackageindex.com/grpc/grpc-swift/documentation
 [spi-grpc-swift-protobuf]: https://swiftpackageindex.com/grpc/grpc-swift-protobuf/documentation