Update actions/download-artifact action to v8

Author: renovate[bot]

.github/workflows/blank.yml

@@ -42,7 +42,7 @@ jobs:
     permissions: write-all
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v4.3.0
+      - uses: actions/download-artifact@v8.0.1
         with:
           pattern: AppImage-*
           merge-multiple: true