Bump osbuild/bootc-image-builder-action

Bumps [osbuild/bootc-image-builder-action](https://github.com/osbuild/bootc-image-builder-action) from 8661cd3832544ad68c12dcde8681b13ab0f56a8d to 028e4d28330efe546229eb9cb52aee78174d2347.
- [Release notes](https://github.com/osbuild/bootc-image-builder-action/releases)
- [Commits](osbuild/bootc-image-builder-action@8661cd3...028e4d2)

---
updated-dependencies:
- dependency-name: osbuild/bootc-image-builder-action
  dependency-version: '028e4d28330efe546229eb9cb52aee78174d2347'
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build-disk.yml

@@ -79,7 +79,7 @@ jobs:
 
       - name: Build disk images
         id: build
-        uses: osbuild/bootc-image-builder-action@8661cd3832544ad68c12dcde8681b13ab0f56a8d # main
+        uses: osbuild/bootc-image-builder-action@028e4d28330efe546229eb9cb52aee78174d2347 # main
         with:
           builder-image: ${{ env.BIB_IMAGE }}
           config-file: ${{ matrix.disk-type == 'anaconda-iso' && './disk_config/iso.toml' || './disk_config/disk.toml' }}