[any.assign] Rename T to VT. (#1448)

These renames were overlooked in commit 8b1f6cc.

Fixes #1443.

Author: jensmaurer

source/utilities.tex

@@ -5636,12 +5636,12 @@
 \pnum
 \remarks
 This operator shall not participate in overload resolution unless
-\tcode{T} is not the same type as \tcode{any} and
-\tcode{is_copy_constructible_v<T>} is \tcode{true}.
+\tcode{VT} is not the same type as \tcode{any} and
+\tcode{is_copy_constructible_v<VT>} is \tcode{true}.
 
 \pnum
 \throws
-Any exception thrown by the selected constructor of \tcode{T}.
+Any exception thrown by the selected constructor of \tcode{VT}.
 \end{itemdescr}
 
 \rSec3[any.modifiers]{Modifiers}