Update team.yml

Author: straessler1

_data/team.yml

@@ -47,7 +47,7 @@ team-members-list:
 # Team Member
 - firstname: Karl
   lastname: Sträßler
-  tagline: Kassier
+  tagline: Kassierer
   avatar: karl-straessler.jpg
   email: karl.straessler@wien.coderdojo.net