oc-csl: Prevent ' from being a LaTeX active char

* lisp/oc-csl.el (org-cite-csl-finalizer): The hanging LaTeX package
we're using also affects punctuation and makes `,.'"`?!:;' active
characters throughout the entire document.  That means a LaTeX snippet
like \(f'(x)\) will now make the document fail to compile.
See <https://tex.stackexchange.com/questions/61732/hanging-package-chokes-on-apostrophes>
for more information.  Adding the [notquote] option stops \(f'(x)\) from
being an issue.

In time it could be worth looking into replacing the hanging package
with some use of \parshape.

lisp/oc-csl.el

@@ -595,7 +595,7 @@ property list."
         (goto-char (match-beginning 0))
         (let ((re (rx "\\usepackage" (opt "[" (*? nonl) "]") "{hanging}")))
           (unless (re-search-backward re nil t)
-            (insert "\\usepackage{hanging}\n"))))
+            (insert "\\usepackage[notquote]{hanging}\n"))))
       (buffer-string))))