[annex] Fix table numbering in annexes

Fixes ISO/CS 029 (C++23 DIS).

Author: jensmaurer

source/std.tex

@@ -143,6 +143,8 @@
 \immediate\write\@auxout{\noexpand\@writefile{toc}{\noexpand\let\noexpand\chapternumberlinebox\noexpand\annexnumberlinebox}}
 \makeatother
 
+\numberwithin{table}{chapter}
+
 \include{grammar}
 \include{limits}
 \include{compatibility}