fix: system-config.org paren balance (missing defun close)

lisp/system-config.lisp

@@ -148,9 +148,9 @@
                (if (> (length key) 0)
                    (progn (config-set env-key key)
                           (format t "✓ ~a API key saved~%" chosen))
-                   (format t "Skipping ~a — no key entered.~%" chosen))))))))
-  
-  (format t "~%"))
+                    (format t "Skipping ~a — no key entered.~%" chosen))))))))
+
+  (format t "~%")))
 
 (defun setup-add-provider ()
   "Entry point for adding a single provider (called from CLI)."