update workflow to use arch specific image pattern

Author: leighmcculloch

.github/workflows/newbuild.yml

@@ -204,7 +204,7 @@ jobs:
     - name: Download Images
       uses: actions/download-artifact@v4
       with:
-        pattern: image-*
+        pattern: image-*-${{ matrix.arch }}.*
         merge-multiple: true
         path: /tmp/images
     - name: Load Image into Docker