[Doc] Mention minimum Go version required for development (#1288)

Author: kevin85421

docs/developer/quickstart.md

@@ -9,7 +9,7 @@ fully prepared development environment that allows you to contribute to the proj
 Follow these steps to set up your development environment.
 
 1. Install:
-    - [Go](https://golang.org/doc/install)
+    - [Go](https://golang.org/doc/install) v1.21.0+
     - [Docker](https://docs.docker.com/get-docker/) v18.09+
     - [Kind](https://kind.sigs.k8s.io/docs/user/quick-start/)
     - [Helm](https://helm.sh/docs/intro/quickstart/#install-helm)