[exec] Add missing \exposid (#7170)

Author: Eelis

source/exec.tex

@@ -1563,7 +1563,7 @@
 
 \begin{itemdecl}
 template<class Tag, class Data = see below, class... Child>
-  constexpr auto make-sender(Tag tag, Data&& data, Child&&... child);
+  constexpr auto @\exposid{make-sender}@(Tag tag, Data&& data, Child&&... child);
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -3711,7 +3711,7 @@
 \end{codeblock}
 
 \begin{itemdecl}
-local-state(Sndr&& sndr, Rcvr& rcvr) noexcept;
+@\exposid{local-state}@(Sndr&& sndr, Rcvr& rcvr) noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}