Ensure there is a 16:9 image defined in NewsArticle structured data

From the [SEO Audit](https://drive.google.com/file/d/1XS9QP1HkjGkIJ4ehcoSVatVqWJQ8NhNX/view?usp=sharing)

> For the Discover feed, Google prefers using featured images with a minimum width of 1200 pixels, and a 16:9 aspect ratio.
> Ensure that there is a 16:9 aspect ratio image defined in your `NewsArticle` structured data. With a standard width of 1200 pixels, this means you need to have an image included in the structured data’s image array that is 1200 by 675.
> Here is more information about Google’s recommended image sizes:
> - https://developers.google.com/search/docs/appearance/structured-data/article#article-types
> - https://developers.google.com/search/docs/appearance/google-discover