Ok cool - I just made a branch with an updated help page and pushed it. However, I can't see how I turn that branch into a PR - there's no option for 'new pull request' or equivalent.
Perhaps that's because I don't have contributor status. Feels a bit chicken - egg right now but, once I've made my first commit, I'll write all the steps into the help page for others to understand.
FYI, the branch I pushed was called 'update/wiki_text'
Change some details but I'm not convinced.
The one above is better because the background is more conservative, without so much detail.
The background doesn't seek to stand out, it seeks to fulfill its role.
In the first photo I used a generic concept of the graphic style of Paradox games.
If you pay attention, the backgrounds don't stand out; their role is not to stand out, they don't seek to take away the prominence of the sets or the titles.