Use get_template_directory_uri for images to protect Child Theme patterns

[0aveRyan]

Ollie is really neat! Y'all built something really cool 😎

I did notice a mix of get_template_directory_uri() and get_stylesheet_directory_uri() in the /patterns that resulted in some 404's when using a Child Theme.

The assets aren't copied into the child/stylesheet directory so for that case I think get_template_directory_uri() would likely be more-seamless for most users who want to customize.