[any.cons] fix tag typename; "in_place<T>" should be "in_place_type<T>"

Fixes NB JP 10 (C++17 DIS)

Author: tkoeppe

source/utilities.tex

@@ -5194,7 +5194,7 @@
 \pnum
 \effects
 If \tcode{other.has_value()} is \tcode{false}, constructs an object that has no value.
-Otherwise, equivalent to \tcode{any(in_place<T>, any_cast<const T\&>(other))}
+Otherwise, equivalent to \tcode{any(in_place_type<T>, any_cast<const T\&>(other))}
 where \tcode{T} is the type of the contained value.
 
 \pnum