Remove "build images" link from README (#1575)

The Getting Started guide refers to deploying and installing NGF, which doesn't require building an image. This link doesn't make sense to have after these steps, and that guide is mainly written  as an alternate option for devs. In the context of Getting Started, it feels unnecessary, and can be found through the docs naturally if needed.

Author: sjberman

README.md

@@ -18,11 +18,8 @@ Learn about our [design principles](/docs/developer/design-principles.md) and [a
 
 1. [Quick Start on a kind cluster](https://docs.nginx.com/nginx-gateway-fabric/installation/running-on-kind/).
 2. [Install](https://docs.nginx.com/nginx-gateway-fabric/installation/) NGINX Gateway Fabric.
-3. [Build](https://docs.nginx.com/nginx-gateway-fabric/installation/ngf-images/building-the-images/) an NGINX Gateway Fabric container image from source or use a pre-built image
-   available
-   on [GitHub Container Registry](https://github.com/nginxinc/nginx-gateway-fabric/pkgs/container/nginx-gateway-fabric).
-4. Deploy various [examples](examples).
-5. Read our [How-to guides](https://docs.nginx.com/nginx-gateway-fabric/how-to/).
+3. Deploy various [examples](examples).
+4. Read our [How-to guides](https://docs.nginx.com/nginx-gateway-fabric/how-to/).
 
 You can find the comprehensive NGINX Gateway Fabric user documentation on the [NGINX Documentation](https://docs.nginx.com/nginx-gateway-fabric/) website.