[class.temporary] Clarify that list of contexts is exhaustive, say "temporary objects"

Fixes NB US 19-037 (C++26 CD).

Author: eisenwave

source/basic.tex

@@ -4768,8 +4768,8 @@
 \pnum
 \indextext{initializer!temporary and declarator}%
 \indextext{temporary!order of destruction of}%
-There are several contexts in which temporaries are destroyed at a different
-point than the end of the full-expression.
+Temporary objects are destroyed at a different point
+than the end of the full-expression in the following contexts:
 The first context is when a default constructor is called to initialize
 an element of an array with no corresponding initializer\iref{dcl.init}.
 The second context is when a copy constructor is called to copy an element of