fix find-seconds error reporting to say "find-seconds" instead

of "find-secs"

collects/racket/date.rkt

@@ -272,7 +272,7 @@
 
 (define (find-seconds sec min hour day month year [local-time? #t])
   (define (signal-error msg)
-    (error 'find-secs (string-append 
+    (error 'find-seconds (string-append 
                           msg 
                           " (inputs: ~a ~a ~a ~a ~a ~a)")
            sec min hour day month year))