Update actions/download-artifact action to v6

Author: renovate[bot]

.github/workflows/blank.yml

@@ -52,15 +52,15 @@ jobs:
     permissions: write-all
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v4.3.0
+      - uses: actions/download-artifact@v6.0.0
         with:
           name: AppImage-x86_64
 
-      - uses: actions/download-artifact@v4.3.0
+      - uses: actions/download-artifact@v6.0.0
         with:
           name: AppImage-aarch64
 
-      - uses: actions/download-artifact@v4.3.0
+      - uses: actions/download-artifact@v6.0.0
         with:
           name: version