Improved formatting of doc/EXAMPLES.md

[o-mdr]

• added "./" so that commands can be copy-pasted into the PowerShell

[msftclas]

Hi @o-mdr, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

This seems like a small (but important) contribution, so no Contribution License Agreement is required at this point. Real humans will now evaluate your PR.

TTYL, MSBOT;

[ras0219-msft]

Thanks for noticing and fixing this!

One note for future fixes of this nature: unfortunately cmd.exe doesn't like ./vcpkg, so we have to be very careful to always use .\.