Update setup-guides-for-microsoft-365.md

[v-miamoros]

Added a new entry/guide for Unify your security operations as this guide was released on 5/13/2025.

[learn-build-service-prod]

Learn Build status updates of commit 0ab5e05:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-365/enterprise/setup-guides-for-microsoft-365.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit f1eca0a:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-365/enterprise/setup-guides-for-microsoft-365.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit be2dcc5:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-365/enterprise/setup-guides-for-microsoft-365.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel