Use @ for affiliation consistently

Signed-off-by: Kurt Garloff <kurt@garloff.de>

Author: garloff

blog/authors.yml

@@ -12,12 +12,12 @@ itrich:
 
 garloff:
   name: Kurt Garloff
-  title: CEO @ S7n Cloud Services, former CTO SCS
+  title: CEO @ S7n Cloud Services, former CTO @ SCS
   url: https://github.com/garloff
   image_url: https://github.com/garloff.png
 
 fkr:
   name: Felix Kronlage-Dammers
-  title: Leader Forum SCS-Standards
+  title: Leader Forum SCS-Standards @ OSBA
   url: https://github.com/fkr
   image_url: https://github.com/fkr.png