org-latex.el (org-export-as-latex): Fix typo in docstring

* org-latex.el (org-export-as-latex): Fix typo in docstring.

lisp/org-latex.el

@@ -872,7 +872,7 @@ no LaTeX header.
 When BODY-ONLY is set, don't produce the file header and footer,
 simply return the content of \\begin{document}...\\end{document},
 without even the \\begin{document} and \\end{document} commands.
-when PUB-DIR is set, use this as the publishing directory."
+When PUB-DIR is set, use this as the publishing directory."
   (interactive "P")
   (when (and (not body-only) arg (listp arg)) (setq body-only t))
   (run-hooks 'org-export-first-hook)