Web updates

Web App Manifests e9185f8e6882

Update manifest example to be consistent (#635) The `name`, `description`, and `short_name` in this manifest example were describing a donation app, while the other attributes (`scope`, `start_url`, `screenshots`) were for a racing game. This updates the `name`, `description`, and `short_name` to refer to the racing game, which makes the manifest consistent internally within itself and consistent externally with the [manifest in]. [manifest in]: