Fix for obscure hyperref/xelatex issue.

Here's a minimal case:

    \documentclass[]{article}
    \usepackage{hyperref}
    \begin{document}
    \section{\%á}
    \end{document}

Without this change, this fails on the second invocation of xelatex.
See https://tex.stackexchange.com/questions/313266/and-non-ascii-characters-in-headings

This affects inputs this like

    # %á

with pdf output via xelatex.

default.latex

@@ -57,11 +57,11 @@ $endif$
 $if(geometry)$
 \usepackage[$for(geometry)$$geometry$$sep$,$endfor$]{geometry}
 $endif$
-\usepackage{hyperref}
+\usepackage[unicode=true]{hyperref}
 $if(colorlinks)$
 \PassOptionsToPackage{usenames,dvipsnames}{color} % color is loaded by hyperref
 $endif$
-\hypersetup{unicode=true,
+\hypersetup{
 $if(title-meta)$
             pdftitle={$title-meta$},
 $endif$