v3 upgrade complete

Author: DanielLarsenNZ

README.md

@@ -22,6 +22,8 @@ description: "This architecture walks you through the process involved in develo
 [![Node.js CI](https://github.com/Azure-Samples/Serverless-microservices-reference-architecture/actions/workflows/nodejs.yml/badge.svg)](https://github.com/Azure-Samples/Serverless-microservices-reference-architecture/actions/workflows/nodejs.yml) 
 [![spa build](https://github.com/Azure-Samples/Serverless-microservices-reference-architecture/actions/workflows/spa.yml/badge.svg)](https://github.com/Azure-Samples/Serverless-microservices-reference-architecture/actions/workflows/spa.yml)
 
+> This sample has been upgraded to Azure Functions v3. An upgrade to Azure Functions v4 is in progress. See [PR #43](https://github.com/Azure-Samples/Serverless-microservices-reference-architecture/pull/43) for details.
+
 ## The reference architecture
 
 ![RideShare Macro Architecture](documentation/media/macro-architecture.png)