add changelog ref

Author: rickeylev

CHANGELOG.md

@@ -54,6 +54,7 @@ END_UNRELEASED_TEMPLATE
   for idiomatic path manipulation of runfiles. It is created by calling the
   {obj}`Runfiles.root` instance method. The {obj}`Path` class also has a
   {obj}`Path.runfiles_root` method to return the root of the runfiles tree.
+  Fixes [#3296](https://github.com/bazel-contrib/rules_python/issues/3296).
 
 {#v2-0-0}
 ## [2.0.0] - 2026-04-09