update in this swagger.yaml #897

[muniraj321]

Issue/Feature Description:
update name and description in this file should be disk-> get/v1/disks
GET v1/disks is showing "ports" instead of "disks"
and also in description it was showing ports

Why this issue to fixed / feature is needed(give scenarios or use cases):

How to reproduce, in case of a bug:

Other Notes / Environment Information: (Please give the env information, log link or any useful information for this issue)