Text not visible in Cards example

In the *plugin-projection* [3D cards example](https://pixijs.io/examples/#/plugin-projection/cards.js),  the ['Tap on cards' text ](https://github.com/pixijs/examples/blob/b3f56a8223a4a688b435495e72b71e1de0806734/examples/js/plugin-projection/cards.js#L196-L210) does not display.

