Add arXiv icon

[foo-dogsquared]

Issue: #1854

Checklist

• I updated the JSON data in _data/simple-icons.json
• I optimized the icon with SVGO or SVGOMG
• The SVG viewbox is 0 0 24 24

Description

Seems like the wordmark is more appropriate here since it is pretty recognized and it is the face of their social media (Twitter for a larger example).

[birjj]

I agree that the wordmark seems to be the right choice here (for context it's also used as the favicon of their blog and their logo on GitHub), but I could probably be convinced to use the favicon instead too, if a high-res version is found as a reference.

Given that that's a subjective thing I'll let one of the other @simple-icons/maintainers merge this in.

[phatbhoy67]

Hey @birjolaxew, there is an official .svg for the favicon in this "about" page source.

[birjj]

Hmm. I personally still think that the wordmark is more appropriate than the logomark, solely because the logomark only seems to be used as their favicon and nowhere else. Thoughts @simple-icons/maintainers (maybe specifically @ericcornelissen, since everyone else is already involved)?

[ericcornelissen]

I agree that the wordmark is a better choice her for the reason pointes out by @birjolaxew