[meta.reflection.member.queries] Add commas

Author: Andreas-Krug

source/meta.tex

@@ -5563,9 +5563,9 @@
 and $M$ is
 \begin{itemize}
 \item
-  a class or enumeration type
+  a class or enumeration type,
 \item
-  a type alias
+  a type alias,
 \item
   a class template, function template,
   variable template, alias template, or concept,