[Reference feedback]: az backup policy | Give example JSON for parameter `--policy`

### Type of issue

Other (describe below)

### Reference command name

az backup policy

### Feedback

This GitHub issue is being created from UUF [400169](https://dev.azure.com/msft-skilling/Content/_workitems/edit/400169).
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### Engineering request
Provide example JSON for the `--policy` parameter


### Customer verbatim
Verbatim:
Can you give examples of the policy object?

### Verbatim Id:
78f52216-47f4-ef11-9342-6045bd032065

### UUF Triage App Feedback URL:
https://aka.ms/UUFTriageApp?pageviewid=d4fb82b8-fffa-3c15-a643-b73d80d4e609

### Page URL

https://learn.microsoft.com/en-us/cli/azure/backup/policy

### Content source URL

https://github.com/MicrosoftDocs/azure-docs-cli/blob/live/latest/docs-ref-autogen/backup/policy.yml

### Author

_No response_

### Document Id

_No response_