Update policies-communications.md

[karacortez]

Please update to include upcoming change to email notifications

[learn-build-service-prod]

Learn Build status updates of commit 4f8acf8:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
power-platform/admin/policies-communications.md	⚠️Warning		Details

power-platform/admin/policies-communications.md

• Line 8, Column 10: [Warning: ms-date-invalid - See documentation] Invalid date format for 'ms.date': '10/17/24'. If specified, must be a date in format M/D/YYYY, no more than 30 days from today. If you don't specify ms.date, the date will be updated automatically.
• Line 29, Column 306: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/power-platform/admin/use-service-admin-role-manage-tenant#assign-a-service-admin-role-to-a-user' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 29, Column 306: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/power-platform/admin/use-service-admin-role-manage-tenant#assign-a-service-admin-role-to-a-user' will be broken in isolated environments. Replace with a relative link.

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