[allocator.uses.construction] Add missing closing parentheses (#4729)

The parentheses were erroneously omitted from 9ffd955 during the application of LWG3527.

Author: JohelEGP

source/utilities.tex

@@ -7818,8 +7818,8 @@
 Equivalent to:
 \begin{codeblock}
 return uses_allocator_construction_args<T>(alloc, piecewise_construct,
-                                           forward_as_tuple(get<0>(std::move(pr)),
-                                           forward_as_tuple(get<1>(std::move(pr)));
+                                           forward_as_tuple(get<0>(std::move(pr))),
+                                           forward_as_tuple(get<1>(std::move(pr))));
 \end{codeblock}
 \end{itemdescr}