Add required permission to API reference

### Existing documentation URL(s)

https://developers.cloudflare.com/api/resources/zero_trust/subresources/devices/subresources/devices/methods/get/

### What changes are you suggesting?

Some Cloudflare's API reference document have required/accepted permissions outlined but few others do not show this clearly.

For example,

Zero Trust : https://developers.cloudflare.com/api/resources/zero_trust/subresources/devices/subresources/devices/methods/get/

Please review all APIs and ensure relevant API permission is added to allow ease of permission auditing.

### Additional information

_No response_