Roll Dart SDK from 09b91afe9f4d to 56cc05dd11a8 (1 revision) (flutter#179231)

https://dart.googlesource.com/sdk.git/+log/09b91afe9f4d..56cc05dd11a8

2025-11-28 [email protected]
Version 3.11.0-188.0.dev

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Author: engine-flutter-autoroll

DEPS

@@ -59,7 +59,7 @@ vars = {
   # updated revision list of existing dependencies. You will need to
   # gclient sync before and after update deps to ensure all deps are updated.
   # updated revision list of existing dependencies.
-  'dart_revision': '09b91afe9f4d70e69e489bd900b583a590a9d535',
+  'dart_revision': '56cc05dd11a8a94be71210af8f2f231b645a9509',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py