fix(org): update load, declare-function

In Emacs 31, org-element-property and org-element-type have moved to
a new file: org-element-ast.

Update code to handle this properly.

Signed-off-by: Bruce D'Arcus <bdarcus@gmail.com>

Author: bdarcus

citar-org.el

@@ -28,8 +28,8 @@
 (require 'oc-csl)
 
 (declare-function org-open-at-point "org")
-(declare-function org-element-property "org-element")
-(declare-function org-element-type "org-element")
+(declare-function org-element-property "ext:org-element")
+(declare-function org-element-type "ext:org-element")
 (declare-function org-cite-make-insert-processor "oc")
 (declare-function org-cite-get-references "oc")
 (declare-function embark-act "ext:embark")