[range.concat] Add missing \exposid to "iterator" (#7632)

Author: lprv

source/ranges.tex

@@ -8759,7 +8759,7 @@
   public:
     @\exposid{iterator}@() = default;
 
-    constexpr @\exposid{iterator}@(iterator<!Const> i)
+    constexpr @\exposid{iterator}@(@\exposid{iterator}@<!Const> i)
       requires Const && (@\libconcept{convertible_to}@<iterator_t<Views>, iterator_t<const Views>> && ...);
 
     constexpr decltype(auto) operator*() const;
@@ -9481,7 +9481,7 @@
 \par % This paragraph is part of the \remarks clause.
 The expression in the \grammarterm{requires-clause} is equivalent to
 \begin{codeblock}
-@\libconcept{swappable_with}@<iter_reference_t<iterator>, iter_reference_t<iterator>> &&
+@\libconcept{swappable_with}@<iter_reference_t<@\exposid{iterator}@>, iter_reference_t<@\exposid{iterator}@>> &&
 (... && @\libconcept{indirectly_swappable}@<iterator_t<@\exposid{maybe-const}@<Const, Views>>>)
 \end{codeblock}
 \end{itemdescr}