Is it possible to update the pr-# tag on pushes to the pull request?

[briceburg]

It seems that the pr-# tag is created once when the pull request opens.

I'd like subsequent pushes to the PR branch to re-tag the image so that the image:pr-123 image always reflects the latest built image from PR-123. Is this possible?

My current implementation is:

 - name: Determine Image Metadata (tags, labels)
    id: meta
    uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
    with:
      images: ${{ inputs.registry }}/${{ inputs.image }}
      tags: |
        type=schedule,priority=10
        type=ref,event=tag,priority=9
        type=sha,format=long,prefix=,priority=8
        type=ref,event=pr,priority=5
        type=ref,event=branch,priority=5

which seems to only produce the sha and branch tags when I make pushes to the branch which has an open PR, e.g.

ghcr.io/foo/bar:208176a7386310c60ce19fb1adb1c4eaf5cb37f2
ghcr.io/foo/bar:my-branch

where I would expect the following if my-branch has an open PR (#123);

ghcr.io/foo/bar:208176a7386310c60ce19fb1adb1c4eaf5cb37f2
ghcr.io/foo/bar:pr-123
ghcr.io/foo/bar:my-branch