github: update all workflows...

Author: klange

.github/workflows/aarch64.yml

@@ -28,7 +28,7 @@ jobs:
             ramdisk.igz
             bootstub
       - name: Upload rpi400 Artifacts
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: aarch64-rpi400
           path: |