A Wasm layer changes by one byte after its OCI manifest is created. What must the publish…

A Wasm layer changes by one byte after its OCI manifest is created. What must the publisher do?

1. Recalculate the layer descriptor and every parent config or manifest digest affected by it.
2. Keep the old digest because the media type did not change.
3. Update only the human-readable tag in index.json.
4. Round the layer size to the nearest kilobyte and keep the manifest.