[docs] added flutter-fix and dart-fix public links (#77463)

packages/flutter/lib/fix_data.yaml

@@ -2,7 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# TODO(Piinks): Add link to public user guide when available.
+# For details regarding *Flutter Fix* feature, see
+# https://flutter.dev/docs/development/tools/flutter-fix
 
 # Please add new fixes to the top of the file, separated by one blank line
 # from other fixes. In a comment, include a link to the PR where the change

packages/flutter/test_fixes/README.md

 ## Directory contents
 
 The Dart files and golden master `.expect` files in this directory are used to
-test the `dart fix` framework refactorings used by the Flutter framework.
-
-<!-- TODO(devoncarew): Add link to public user guide when available. -->
+test the [`dart fix` framework](https://dart.dev/tools/dart-fix) refactorings used by the Flutter framework.
 
 See the flutter/packages/flutter/lib/fix_data.yaml file for the current package:flutter
 data driven fixes.