[meta.reflection.queries] Fixes "Constant When" elements of "dealias" and "template_of".

This seems to have been a mistake during application of P2996R13.

Author: tkoeppe

source/meta.tex

@@ -4805,6 +4805,10 @@
 \end{itemdecl}
 
 \begin{itemdescr}
+\pnum
+\constantwhen
+\tcode{r} represents an entity.
+
 \pnum
 \returns
 A reflection representing the underlying entity of what \tcode{r} represents.
@@ -4825,6 +4829,10 @@
 \end{itemdecl}
 
 \begin{itemdescr}
+\pnum
+\constantwhen
+\tcode{has_template_arguments(r)} is \tcode{true}.
+
 \pnum
 \returns
 \tcode{true} if \tcode{r} represents a specialization of a
@@ -4833,11 +4841,6 @@
 class template, or
 an alias template.
 Otherwise, \tcode{false}.
-
-\pnum
-\throws
-\tcode{meta::exception} unless
-\tcode{r} represents an entity.
 \end{itemdescr}
 
 \indexlibraryglobal{template_of}%