Fix update.img path

.github/workflows/build.yaml

@@ -30,7 +30,7 @@ jobs:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
         upload_url: ${{ steps.create_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps 
-        asset_path: ./output/update.img
+        asset_path: ./output/image/update.img
         asset_name: update.img
         asset_content_type: application/img
     - name: Upload Release Asset output.zip