Use correct IUCN branding on species pages

[MattBlissett]

The scale we use for the showing the red list is from Wikidata and is not the correct branding that IUCN uses. This will need to be updated.

Originally posted by @andrewrodrigues in gbif/pipelines#257 (comment)

Thomas or Morten will presumably need to know what the correct branding is.

[MortenHofft]

I'm unable to find any image resources and useful branding guidelines or similar on their website.

I see that they use below (e.g. here). But the link I can extract from peaking in their code does not look like it is intended for public use: https://nrl.iucnredlist.org/assets/category-scale/category-scale_en-b35daaf0196bafd2fb96e6b3496d3152e032d75bf09c471dcc493eeb930c724b.svg

And this pdf is the description I can find on the website
https://www.iucnredlist.org/resources/redlistguidelines

@andrewrodrigues could you possibly get some more info on what they want and have them provide the resources we need. The PDF doesn't not seem to have relevant info, but I didn't read the 113 pages carefully.

[MortenHofft]

closed by 78f600a