Squash and Merge PR Support for Reusable Release

[cmarshak]

I was using squash and merge to make my merge commits look nicer.

However, the reusable release failed when using a squash and merge.

Here is an example: https://github.com/opera-adt/dist-s1-enumerator/actions/runs/12799787466/job/35686477542

The issue is here: https://github.com/ASFHyP3/actions/blob/develop/.github/workflows/reusable-release.yml#L39-L44

Would be interested if this is a quick fix and/or how to fix this fast forward merge manually.