Update actions/download-artifact action to v4.2.1

Author: renovate[bot]

.github/workflows/blank.yml

@@ -47,10 +47,10 @@ jobs:
       runs-on: ubuntu-latest
 
       steps:
-        - uses: actions/download-artifact@v4.1.8
+        - uses: actions/download-artifact@v4.2.1
           with:
             name: AppImage
-        - uses: actions/download-artifact@v4.1.8
+        - uses: actions/download-artifact@v4.2.1
           with:
             name: version