Replacement of Markdown formatting in `\changes`.

style/mu/base.dtx

@@ -199,7 +199,7 @@
 %     respectively.
 % \changes{v1.0.3}{2022/08/15}{^^A
 %     Added the the default \textt{colorbold} and \texttt{nocolorbold}
-%     options for `digital` and `printed`, respectively. [TV]}
+%     options for \texttt{digital} and \texttt{printed}, respectively. [TV]}
 %    \begin{macrocode}
 \newif\ifthesis@digital@
 \DeclareOption{digital}{%