Issues not linked (projectwise) to pullrequests with loose-matching

[alt-13]

The action checks for linked issues in the PR body with loose-matching but the issue is not linked to the PR projectwise if the PRs base branch is not the default branch.

Maybe pullRequest?.closingIssuesReferences can be updated...?

[simoneb]

I would say we're not going to do this link ourselves, but rather update the docs to reflect that the link happens only when using the github well-known syntax.