Mirgrate gradle_deprecated_settings to null safety (#80559)

diff --git a/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml b/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml
index 9e99d23..8a4ed49 100644
--- a/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml
+++ b/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Integration test for the current settings.gradle.
 
 environment:
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter: