Pull request description is not updated when the pull request body is empty

[Romack]

As a developer, I would like the pull request description to be updated with the details from the JIRA ticket even if the pull request description is empty/null.

For simple changes, the pull request title and/or commit comments are sufficient context for the pull request reviewer. In those cases, a pull request description may not be needed. In those instances, I would still like for the pull request description to be updated with the ticket details.

In this case, the value returned for 'body' is null

{
"body": null
}

the default value of '' is not honored and prBody is set to null below

const {
      body: prBody = '',
    } = pullRequest as PullRequestParams;