astro@4.16.6

#11823 a3d30a6 Thanks @DerTimonius! - fix: improve error message when inferSize is used in local images with the Image component
#12227 8b1a641 Thanks @florian-lefebvre! - Fixes a case where environment variables would not be refreshed when using astro:env
#12239 2b6daa5 Thanks @ematipico! - BREAKING CHANGE to the experimental Container API only

Changes the default page rendering behavior of Astro components in containers, and adds a new option partial: false to render full Astro pages as before.

Previously, the Container API was rendering all Astro components as if they were full Astro pages containing <!DOCTYPE html> by default. This was not intended, and now by default, all components will render as page partials: only the contents of the components without a page shell.

To render the component as a full-fledged Astro page, pass a new option called partial: false to renderToString() and renderToResponse():
```
import { experimental_AstroContainer as AstroContainer } from 'astro/container';
import Card from '../src/components/Card.astro';

const container = AstroContainer.create();

await container.renderToString(Card); // the string will not contain `<!DOCTYPE html>`
await container.renderToString(Card, { partial: false }); // the string will contain `<!DOCTYPE html>`
```