Upgrade actions/download-artifact from 5 to 6 version (#10)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -76,7 +76,7 @@ jobs:
       - uses: actions/checkout@v5
       - run: make npm.install
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: image-${{ github.run_number }}
           path: .cache/
@@ -122,7 +122,7 @@ jobs:
           text: ${{ github.repository }}
           regex: '^${{ github.repository_owner }}/(.+)-docker-image$'
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: image-${{ github.run_number }}
           path: .cache/