Add a missing "}"

siunitx.tex

@@ -2159,7 +2159,7 @@ \subsection{Lists, products and ranges}
 \DescribeOption{range-close-bracket}
 \DescribeOption{range-open-bracket}
 The brackets used can be customised using the relevant \texttt{\dots-close-bracket}
-and \texttt{\dots-open-bracket options.
+and \texttt{\dots-open-bracket} options.
 \begin{LaTeXdemo}
   \sisetup{
     list-units         = bracket ,