Verify Markdown Links test experiences frequent intermittent failures due to transient issues, e.g.:

• https://github.com/PowerShell/PowerShell/pull/13086/checks?check_run_id=842863871

We could increase CI reliabilty by restricting markdown static tests to PRs where markdown files are modified.

We should also run markdown-link-check test on a schedule to detect dead links seperately from normal CI. There are Github actions available that will run the check and automatically open an issue if broken links are found.