Docs: Broken links to 3rd party website

[nginx-aoife]

Describe the bug
Recent changes to the https://docs.docker.com/ site means some links in the nginx-gateway-fabric docs are now returning 404s.

To Reproduce
Open: https://docs.nginx.com/nginx-gateway-fabric/installation/ngf-images/pulling-ngf-image/#configuring-docker-for-the-f5-container-registry
Click Docker for Windows and Docker for Mac. Both return a 404 page on the Docker site.

Expected behavior
Valid pages should open

Additional context

[nginx-bot]

Hi @nginx-aoife!

Thanks for opening this issue!
Be sure to check out our Contributing Guidelines and the Issue Lifecycle while you wait for someone on the team to take a look at this.

[sjberman]

We really should have a pipeline job that can scan for invalid links.