Bump json_serializable from 6.4.0 to 6.4.1 in /auto_submit (#2174)

diff --git a/auto_submit/pubspec.lock b/auto_submit/pubspec.lock
index 6e2b8d5..7905d5e 100644
--- a/auto_submit/pubspec.lock
+++ b/auto_submit/pubspec.lock
@@ -378,7 +378,7 @@
       name: json_serializable
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.4.0"
+    version: "6.4.1"
   lints:
     dependency: transitive
     description:
diff --git a/auto_submit/pubspec.yaml b/auto_submit/pubspec.yaml
index ea0cd9e..e14c658 100644
--- a/auto_submit/pubspec.yaml
+++ b/auto_submit/pubspec.yaml
@@ -30,7 +30,7 @@
 
 dev_dependencies:
   build_runner: ^2.2.1
-  json_serializable: ^6.4.0
+  json_serializable: ^6.4.1
   flutter_lints: ^2.0.0
   mockito: ^5.3.2
   test: ^1.21.6