Broken links in ingress-controller and kubernetes-apps under kubespray docs

[vaibhav2107]

Under ingress controller, in alb_ingress_controller.md:

The AWS ALB Ingress Controller satisfies Kubernetes ingress resources by provisioning Application Load Balancers.

In ingress_nginx.md, an image reference of load balancer is broken

This example creates an ELB with just two listeners, one in port 80 and another in port 443

Under kubernetes-apps, in rbd_provisioner.md:

It works just like in-tree dynamic provisioner. For more information on how dynamic provisioning works, see the docs or this blog post.

[vaibhav2107]

/kind documentation

[vaibhav2107]

/assign