Roll Dart SDK from f5b7d49 to d73ac54 (1 revision) (#33432)

Author: skia-flutter-autoroll

DEPS

@@ -45,7 +45,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'f5b7d492702a2edfc1dbc77ef6180971067b7823',
+  'dart_revision': 'd73ac549789f8edb7400bf5481b8cad998803841',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py