org-up-element: Fix jumping up from inlinetask

* lisp/org.el (org-up-element): Do not assume that
`org-back-to-heading' skips inlinetasks.  Avoid that `if' branch by
skipping over section parents.

Reported-by: Michael Dauer <mick.dauer@gmail.com>
Link: https://orgmode.org/list/CAP7OBxKKeuK_uH46SyEqQbsuBsE=XPkB=ks1TkCZTwyPZ40KaA@mail.gmail.com

lisp/org.el

@@ -20949,8 +20949,11 @@ Move to the previous element at the same level, when possible."
       (unless (org-up-heading-safe) (user-error "No surrounding element"))
     (let* ((elem (org-element-at-point))
 	   (parent (org-element-property :parent elem)))
+      ;; Skip sections
+      (when (eq 'section (org-element-type parent))
+        (setq parent (org-element-property :parent parent)))
       (if (and parent
-               (not (memq (org-element-type parent) '(section org-data))))
+               (not (eq (org-element-type parent) 'org-data)))
           (goto-char (org-element-property :begin parent))
 	(if (org-with-limited-levels (org-before-first-heading-p))
 	    (user-error "No surrounding element")