[expr.const] Change "value" to "result object" (of a prvalue) (#6267)

Author: frederick-vs-ja

source/expressions.tex

@@ -8483,7 +8483,7 @@
 A \defnadj{constant}{expression} is either
 a glvalue core constant expression that refers to
 an object or a non-immediate function, or
-a prvalue core constant expression whose value
+a prvalue core constant expression whose result object\iref{basic.lval}
 satisfies the following constraints:
 \begin{itemize}
 \item