[unord.req.general] Fix garbled end of sentence

This was an editorial mistake introduced by the transformation of the
requirement tables into regular paragraphs.

Fixes NB US 100 (C++23 CD).

Author: tkoeppe

source/containers.tex

@@ -4796,7 +4796,7 @@
 \pnum
 \effects
 Inserts a \tcode{value_type} object \tcode{t}
-constructed with \tcode{std::forward<Args>(args)...} and
+constructed with \tcode{std::forward<Args>(args)...}.
 
 \pnum
 \returns