RFR: pr: fix Markdown for /backport

[Robin Westberg]

On Mon, 15 Feb 2021 14:47:50 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this small patch that fixes the Markdown in the pull request created by the `/backport` commit command. I had simply forgotten to call `.get()` on an `Optinal<String>` �� 
> 
> Thanks,
> Erik

Looks good!

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Marked as reviewed by rwestberg (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/1018