Include an example where we specify Ready condition, in status,to be false

[Avni-Sharma]

We have provided examples and documentation https://github.com/k8s-service-bindings/spec/blob/master/README.md#reconciler-implementation for the True status of Ready type condition. While it might seem obvious as to when the readiness fails/is false, i.e in the absence of service, but maybe we can be explicit about it in the doc and example. For example:

status:
  conditions:
  - type:   Ready
    status: 'False'

[scothis]

Fleshing out non-normative, user-centric documentation is something I hope we can focus on for RC3.

[nebhale]

Included as part of the scope of servicebinding/website#9 .