[internet.resolver.ops] Add hyphenation hint to fix overfull line

Author: jwakely

src/internetprotocol.tex

@@ -3643,7 +3643,7 @@
 
 \begin{itemdescr}
 \pnum
-\returns \tcode{async_resolve(host_name, service_name, resolver_base::flags(), forward<Completion\-Token>(token))}.
+\returns \tcode{async_resolve(host_name, service_name, resolver_base::flags(), forward<Comp\-l\-et\-ion\-Token>(token))}.
 \end{itemdescr}
 
 \begin{itemdecl}