test-ob-clojure.el: Correct copyright year

testing/lisp/test-ob-clojure.el

@@ -1,6 +1,6 @@
 ;;; test-ob-clojure.el
 
-;; Copyright (c) 2018-2022 Free Software Foundation, Inc.
+;; Copyright (c) 2018-2019 Free Software Foundation, Inc.
 ;; Authors: stardiviner
 
 ;; This file is not part of GNU Emacs.