Correct syntax for signature update documentation

[ericlaw1979]

Correct the syntax for signature update sources documentation

[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.

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:

• (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.
• Retrieve the article source URL from page source:
  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.

If you have questions or need help, please post a message to G+E LMC Support (aka AskAnAdmin) (Microsoft FTE or vendor login required).

[learn-build-service-prod]

Learn Build status updates of commit e3978fa:

✅ Validation status: passed

File	Status	Preview URL	Details
defender-endpoint/manage-protection-updates-microsoft-defender-antivirus.md	✅Succeeded
defender/media/wdav-order-update-sources.png	✅Succeeded

For more details, please refer to the build report.

[ericlaw1979]

This is a stupid waste of time.