message: update the disk.json version for the 2021-03-01
diff: @@ -223,7 +223,7 @@ input-file:
  - Microsoft.Compute/stable/2020-12-01/compute.json
  - Microsoft.Compute/stable/2020-12-01/runCommands.json
  - Microsoft.Compute/stable/2019-04-01/skus.json
  -- Microsoft.Compute/stable/2020-09-30/disk.json
  +- Microsoft.Compute/stable/2020-12-01/disk.json
  - Microsoft.Compute/stable/2019-12-01/gallery.json
  - Microsoft.Compute/stable/2021-03-01/cloudService.json
  ```
  