Merge PR pyapp-kit#121: ci(dependabot): bump actions/download-artifact from 4 to 6

Author: tlambert03

.github/workflows/ci.yml

@@ -105,7 +105,7 @@ jobs:
 
     steps:
       - name: Download built artifact to dist/
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: Packages
           path: dist