CI: update gh sponsor list

Author: Ziggy

assets/github-sponsors-release-notes.html

@@ -68,7 +68,6 @@
 <li>Carlos Pizano Uribe</li>
 <li>Anita SV</li>
 <li>Rene Schallner</li>
-<li>Linus Groh</li>
 <li>Jinkyu Yi</li>
 <li>Jake Hemmerle</li>
 <li>Peter Snelgrove</li>