chore(deps): update actions/download-artifact action to v8 (#8)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
       id-token: write
     steps:
       - name: Download signed packages
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: signed-nuget