Fix release workflow by including only intended artifacts. (#908)

This commit fixes an issue introduced in #895 where Dependabot updated
the `docker/build-push-action` Action to major version 6 from 5. This
change [introduced the inclusion of Docker Build
Summaries](https://github.com/docker/build-push-action/releases/tag/v6.0.0),
which are build artifacts that end in `.dockerbuild` and are uploaded by
default. This change means we need to be more specific regarding the
artifacts we want to download and prepare for inclusion in a GitHub
Release itself. The build summaries are useful to have (so we don't turn
them off), but we don't want them included in the GitHub Release itself.

.github/workflows/build-and-release.yaml

@@ -56,6 +56,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/download-artifact@v4
+        with:
+          pattern: "!*.dockerbuild"
       - name: Create release
         env:
           GH_TOKEN: ${{ github.token }}