'Update Dart SDK to 7d6b67545d2296c2492c2d41ac606fbdfaf4e835' (#34008)

diff --git a/DEPS b/DEPS
index 0765987..7e3bf05 100644
--- a/DEPS
+++ b/DEPS
@@ -45,7 +45,7 @@
   # 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': '16b0538e6ccfe20aad27a4e6a986281d2bbf4e11',
+  'dart_revision': '7d6b67545d2296c2492c2d41ac606fbdfaf4e835',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py