Fix an error introduced in 502e538020d02522dd40b4b5f940cf43d19096ab, org-make-link was replaced by contact instead of concat as the comment suggested

	* org-git-link.el (org-git-create-git-link): Replace contact call by concat
	* org-bookmark.el (org-bookmark-store-link): Replace contact call by concat

TINYCHANGE

contrib/lisp/org-bookmark.el

@@ -80,7 +80,7 @@ Otherwise prompt the user for the right bookmark to use."
 		  (car bmks)
 		(completing-read "Bookmark: " bmks nil t nil nil (car bmks))))))
     (if bookmark
-	(org-store-link-props :link (contact "bookmark:" bookmark)
+	(org-store-link-props :link (concat "bookmark:" bookmark)
 			      :description bookmark))))
 
 (provide 'org-bookmark)

contrib/lisp/org-git-link.el

@@ -171,7 +171,7 @@
   (let* ((gitdir (first (org-git-find-gitdir (file-truename file))))
          (branchname (org-git-get-current-branch gitdir))
          (timestring (format-time-string "%Y-%m-%d" (current-time))))
-    (contact "git:" file "::" (org-git-create-searchstring branchname timestring))))
+    (concat "git:" file "::" (org-git-create-searchstring branchname timestring))))
 
 (defun org-git-store-link ()
   "Store git link to current file."