Fix typo

* lisp/org.el (org-re-timestamp): Fix typo introduced in
  eae19b1284db6b376ccfb3e9f5f44df456f43c1a.

lisp/org.el

@@ -17257,7 +17257,7 @@ both scheduled and deadline timestamps."
     (all org-ts-regexp-both)
     (active org-ts-regexp)
     (inactive org-ts-regexp-inactive)
-    (schedule org-scheduled-time-regexp)
+    (scheduled org-scheduled-time-regexp)
     (deadline org-deadline-time-regexp)
     (closed org-closed-time-regexp)
     (otherwise