Update spreadsheet/macrofree/azure_arc_checklist.en.xlsx

### Type of Content Suggestion

Modify an existing recommendation

### Description of Suggestion

Please update the spreadsheet/macrofree/azure_arc_checklist.en.xlsx to latest 2024

### Context and Rationale

It will help users to check before onboarding on prem machines onto arc

### References or Examples

_No response_

Open spreadsheet/macrofree/azure_arc_checklist.en.xlsx and review its current Azure Arc onboarding checklist. Compare the recommendations with the latest 2024 guidance, then update outdated content for users onboarding on-premises machines to Arc. Verify that the revised workbook remains usable and complete.

Written by the indexing model from the issue text.