refactor: rename orig-fn arg in advice to fn

A minor tweak to our naming conventions for the first argument of an
:around advice.

modules/lang/org/contrib/present.el

@@ -45,7 +45,7 @@ headings as titles, and you have more freedom to place them wherever you like.")
           :n [C-left]  #'org-tree-slide-move-previous-tree)
     (add-hook 'org-tree-slide-mode-hook #'evil-normalize-keymaps))
 
-  (defadvice! +org-present--hide-first-heading-maybe-a (orig-fn &rest args)
+  (defadvice! +org-present--hide-first-heading-maybe-a (fn &rest args)
     "Omit the first heading if `+org-present-hide-first-heading' is non-nil."
     :around #'org-tree-slide--display-tree-with-narrow
     (letf! (defun org-narrow-to-subtree ()
@@ -64,4 +64,4 @@ headings as titles, and you have more freedom to place them wherever you like.")
                           (when (and (org-at-heading-p) (not (eobp)))
                             (backward-char 1))
                           (point)))))))
-      (apply orig-fn args))))
+      (apply fn args))))

modules/lang/org/contrib/roam2.el

@@ -29,14 +29,14 @@ of org-mode to properly utilize ID links.")
   ;; Don't display warning message dedicated for v1 users. Need to be set early.
   (setq org-roam-v2-ack t)
 
-  (defadvice! +org-roam-suppress-sqlite-build-a (orig-fn &rest args)
+  (defadvice! +org-roam-suppress-sqlite-build-a (fn &rest args)
     "Suppress automatic building of sqlite3 binary when loading `org-roam'.
 This is a blocking operation that can take a while to complete
 and better be deferred when there will be an actual demand for
 the database. See `+org-init-roam-h' for the launch process."
     :around #'emacsql-sqlite-ensure-binary
     (if (not (boundp 'org-roam-db-version))
-        (apply orig-fn args)
+        (apply fn args)
       (advice-remove #'emacsql-sqlite-ensure-binary #'+org-roam-suppress-sqlite-build-a)
       nil))