[meta.reflection.array] Add \tcode for true

Author: Andreas-Krug

source/meta.tex

@@ -6273,7 +6273,7 @@
 Let $P$ be
 \begin{itemize}
 \item
-  If \tcode{sizeof...($V$) > 0} is true,
+  If \tcode{sizeof...($V$) > 0} is \tcode{true},
   then the template parameter object\iref{temp.param}
   of type \tcode{const T[\brk{}sizeof...(\brk{}$V$)]}
   initialized with \tcode{\{[:$V$:]...\}}.