[range.dangling] Use "auto" parameter type (#4817)

Author: JohelEGP

source/ranges.tex

@@ -1862,8 +1862,7 @@
 namespace std::ranges {
   struct dangling {
     constexpr dangling() noexcept = default;
-    template<class... Args>
-      constexpr dangling(Args&&...) noexcept { }
+    constexpr dangling(auto&&...) noexcept { }
   };
 }
 \end{codeblock}