Update Safe Links API description for clarity to add Outlook Mobile s…

[urgandhi]

…upport

Updated the description for the Safe Links API to include Outlook on Mobile for iOS and Android.

This work was done a while back but public doc wasn't updated: Feature 4845661: [Prevention - URLs] - Integrate Outlook Mobile with Safelinks to protect clicks from all First party email clients

[github-actions]

Thank you for your contribution! To reduce the chances of pre-release content being released publicly, and to simplify the contribution workflow, Microsoft FTEs and vendors must submit contributions to private repositories. Private repositories typically have the same name as public repositories with the -pr suffix added.

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

• (Preferred) Go to https://aka.ms/SaveTime and paste the public Learn (not GitHub) URL of the page you want to update into the field provided. If you haven't used the Learn Editor before, check out the Learn Editor documentation. If you see a 404, be sure to sign into Learn by clicking Sign in in the top-right corner of the page.
• Install the Microsoft Learn maintenance tool browser extension and, while on the article you want to update, click the extension in the toolbar, then choose MD or YML.
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  1. Right-click on the article page and select View source.
  2. Find original_content_git_url and paste that URL into the address bar of a new tab.
  3. Switch the branch to main.
  4. Click Edit and follow the steps to update the article.

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[learn-build-service-prod]

Learn Build status updates of commit 15865e1:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-office-365/safe-links-about.md	✅Succeeded

For more details, please refer to the build report.