Inserted X next to Vincent Soehnchen (#604)

* Inserted X next to Vincent Soehnchen

* Fixed merge conflict lines 82 83

* fix

Author: vsoehnchen

students.txt

@@ -80,7 +80,7 @@ Sekri	Juliette
 Seugnet	Alec     
 Singh	Ayush     
 Smith	Oliver X     
-Söhnchen	Vincent     
+Söhnchen	Vincent  X 
 Soro	Nangounon Mohamed     
 Storp	Anais     
 Sudhir	Anirudh Karat