[DO NOT MERGE] Updated docs for Custom Sort Order

[SimonWahlin]

Overview/Summary

Update docs to reflect changes in https://github.com/Azure/AzOps-Accelerator/pull/121 Change requested by #592

Please don't merge until the implementing PR is merged into AzOps-Accelerator if there are any changes to the PR before merge.

This PR fixes/adds/changes/removes

1. Update docs to reflect changes in https://github.com/Azure/AzOps-Accelerator/pull/121

Breaking Changes

Testing Evidence

N/A

As part of this Pull Request I have

• [x] Checked for duplicate Pull Requests
• [x] Associated it with relevant issues, for tracking and closure.
• [x] Ensured my code/branch is up-to-date with the latest changes in the main branch
• [x] Performed testing and provided evidence.
• [x] Updated relevant and associated documentation.