[exec.snd.apply,exec.schedule.from] Properly mark "see below" (#7210)

Author: hewillk

source/exec.tex

@@ -2306,7 +2306,7 @@
 namespace std::execution {
   template<class Domain, class Tag, @\libconcept{sender}@ Sndr, class... Args>
     constexpr decltype(auto) apply_sender(Domain dom, Tag, Sndr&& sndr, Args&&... args)
-      noexcept(see below);
+      noexcept(@\seebelow@);
 }
 \end{itemdecl}
 
@@ -2957,7 +2957,7 @@
 The member \tcode{\exposid{impls-for}<schedule_from_t>::\exposid{get-state}}
 is initialized with a callable object equivalent to the following lambda:
 \begin{codeblock}
-[]<class Sndr, class Rcvr>(Sndr&& sndr, Rcvr& rcvr) noexcept(see below)
+[]<class Sndr, class Rcvr>(Sndr&& sndr, Rcvr& rcvr) noexcept(@\seebelow@)
     requires @\libconcept{sender_in}@<@\exposid{child-type}@<Sndr>, env_of_t<Rcvr>> {
 
   auto& [_, sch, child] = sndr;