Bump actions/upload-artifact from 4 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/glpi.yml

@@ -307,7 +307,7 @@ jobs:
 
       - name: "Upload digest"
         if: ${{ needs.prepare.outputs.push == 'true' }}
-        uses: "actions/upload-artifact@v4"
+        uses: "actions/upload-artifact@v6"
         with:
           name: "digests-${{ needs.prepare.outputs.artifact-prefix }}-${{ env.PLATFORM_PAIR }}"
           path: "${{ runner.temp }}/digests/*"