Add link to new ref item

changelog/dmd.auto-ref-adjacent.dd

@@ -2,7 +2,7 @@ Keywords `auto` and `ref` must be adjacent
 
 It's now deprecated to declare `auto ref` parameters without putting those two keywords next to each other.
 This way it's clear that `auto ref` semantics are intended, rather than `ref` and `auto` semantics separately.
-For the newly introduced `ref` local / global variables, it's an error immediately.
+For the newly introduced $(RELATIVE_LINK2 dmd.reflocal, `ref` local / global variables), it's an error immediately.
 
 ---
 void t()(ref const auto int x) // Deprecation