Update robocupssl/ssl-status-board Docker tag to v2.11.6

Author: renovate[bot]

docker-compose.yaml

@@ -71,7 +71,7 @@ services:
       - expose
 
   ssl-status-board:
-    image: robocupssl/ssl-status-board:2.11.5
+    image: robocupssl/ssl-status-board:2.11.6
     restart: unless-stopped
     ports:
       - 8082/tcp