[temp.dep.general] add trailing 'or' (#5186)

Author: ChuanqiXu9

source/templates.tex

@@ -4701,7 +4701,7 @@
 \begin{itemize}
 \item
 any of the expressions in the \grammarterm{expression-list} is a pack
-expansion\iref{temp.variadic},
+expansion\iref{temp.variadic}, or
 \item
 any of the expressions
 or \grammarterm{braced-init-list}{s}