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

[v-miamoros]

A new guide titled 'Manage data exfiltration with Purview' was added and released to production on 7/15. A corresponding entry is now created in the Learn documentation within this update.

[learn-build-service-prod]

Learn Build status updates of commit dead44d:

✅ 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.

[github-actions]

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For example, if the public repository name is contoso-help, the private repository name is usually contoso-help-pr.

Please re-submit your contribution to the private repository. If you can’t find the private repository to use, do one of the following:

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  4. Click Edit and follow the steps to update the article.

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