UN SDG images are commited on this repo, yet they seem broken in production

[teolemon]

What

• UN SDG images are committed on this repo, yet they seem broken in production
• https://world.openfoodfacts.org/presskit
• https://world.openfoodfacts.org/illustrations/un-sdg-logos/EN_SDG_Goals_17.png
• https://github.com/openfoodfacts/openfoodfacts-web/blob/main/html/illustrations/un-sdg-logos/EN_SDG_Goals_17.png

[vnitin08]

@teolemon , After observing a common pattern in almost all the broken images, is that src links like:

points to a 404 page.
I have been trying to use the relative path for the UN SDG images in

lang\en\texts\cop26\blocks\un-sustainable-development-goals.html

and it is working good.

Will complete it soon and make a PR.