PlatyPS errors in the builds

[vors]

I looked-up a successful AppVeyor build and looks there are platyPS errors in it.
https://ci.appveyor.com/project/PowerShell/powershell-docs/build/1.0.81

1. If platyPS produce errors, we should fail the build cc @joeyaiello
2. We should fix the markdown, so there are no errors

[vors]

Done