[range.zip.sentinel] Add missing \exposid around "maybe-const"

Author: eisenwave

source/ranges.tex

@@ -11944,7 +11944,7 @@
 \begin{itemdecl}
 template<bool OtherConst>
   requires (@\libconcept{sentinel_for}@<sentinel_t<@\exposid{maybe-const}@<Const, Views>>,
-                         iterator_t<maybe-const<OtherConst, Views>>> && ...)
+                         iterator_t<@\exposid{maybe-const}@<OtherConst, Views>>> && ...)
 friend constexpr bool operator==(const @\exposid{iterator}@<OtherConst>& x, const @\exposid{sentinel}@& y);
 \end{itemdecl}