CI note: `Verify Site` is failing on pre-existing broken external links in `_includes/refs.md`

[samvaity]

CI note: Verify Site is failing on pre-existing broken external links in _includes/refs.md, not on files changed by this PR.

Broken URLs:

• https://styleguides.azurewebsites.net/StyleGuide/Read?id=2700
• https://styleguides.azurewebsites.net/Styleguide/Read?id=2696

Originally posted by @samvaity in #10037 (comment)