[temp.type] Replace "values are identical" with "value representations are identical"

Author: eisenwave

source/templates.tex

@@ -2481,7 +2481,7 @@
 they are of integral type and their values are the same, or
 
 \item
-they are of floating-point type and their values are identical, or
+they are of floating-point type and their value representations are identical, or
 
 \item
 they are of type \tcode{std::nullptr_t}, or