Update devguide.md to include docker as a pre-req for verify (#4000)

* Update devguide.md

* added docker and buildx 

added docker and buildx to the prereqs section & removed docker as a prereq for make verify specifically

* KinD naming change

Author: PronomitaDey

site-src/contributing/devguide.md

@@ -36,7 +36,9 @@ command in PR and issue comments][issue-cmds]. For example,
 Before you start developing with Gateway API, we'd recommend having the
 following prerequisites installed:
 
-* [Kind](https://kubernetes.io/docs/tasks/tools/#kind): This is a standalone local Kubernetes cluster. At least one container runtime is required. We recommend installing [Docker](https://docs.docker.com/engine/install/). While you can opt for alternatives like [Podman](https://podman.io/docs/installation), please be aware that doing so is at your own risk.
+* [KinD](https://kubernetes.io/docs/tasks/tools/#kind): This is a standalone local Kubernetes cluster. At least one container runtime is required.
+* [Docker](https://docs.docker.com/engine/install/): This is a prerequisite for running KinD. While you can opt for alternatives like [Podman](https://podman.io/docs/installation), please be aware that doing so is at your own risk.
+* [BuildX](https://github.com/docker/buildx): Prerequisite for `make verify` to run.
 * [Kubectl](https://kubernetes.io/docs/tasks/tools/#kubectl): This is the Kubernetes command-line tool.
 * [Go](https://golang.org/doc/install): It is the main programming language in this project. Please check this [file](https://github.com/kubernetes-sigs/gateway-api/blob/main/go.mod#L3) to find out the least `Go` version otherwise you might encounter compilation errors.
 * [Digest::SHA](https://metacpan.org/pod/Digest::SHA): It is a required dependency. You can obtain it by installing the `perl-Digest-SHA` package.