Backport commit 2682ea1b3 from Emacs

* lisp/org.el (org-dynamic-block-define): Autoload because
it's referred to in org-loaddefs.el.

Fix org.el byte-compile warning in org-loaddefs.el
2682ea1b3a9524eb54efac41b3221b514374c232
Lars Ingebrigtsen
Sun Jul 31 11:43:48 2022 +0200

lisp/org.el

@@ -9319,6 +9319,7 @@ TYPE is the dynamic block type, as a string."
   "List all defined dynamic block types."
   (mapcar #'car org-dynamic-block-alist))
 
+;;;###org-autoload
 (defun org-dynamic-block-define (type func)
   "Define dynamic block TYPE with FUNC.
 TYPE is a string.  FUNC is the function creating the dynamic