Add KDE neon icon

[DerBraky]

Issue: closes #11589

Popularity metric: Similarweb Global Rank: 45,533 (KDE neon is one of the primary products from KDE)

Checklist

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

Description

I took the icon and the hex value from kdeneon-jr.svg in the official logo file directory, which can be found on the KDE Community Wiki.

[Cadene]

Are you on main? This issue has been fixed a few days ago.

git fetch origin main
git checkout origin/main