Update DEPS to use Dart tag instead of revision

DEPS

diff --git a/DEPS b/DEPS
index 0ac5661..9514aad 100644
--- a/DEPS
+++ b/DEPS
@@ -48,7 +48,7 @@
   # 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': '93acdbd49ed703fffcaeb35a4cc78d29ca032cf7',
+  'dart_revision': '3.0.0-417.4.beta',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py