Bump mockito from 5.3.0 to 5.3.1 in /auto_submit (#2141)

diff --git a/auto_submit/pubspec.lock b/auto_submit/pubspec.lock
index 19709a4..7be639e 100644
--- a/auto_submit/pubspec.lock
+++ b/auto_submit/pubspec.lock
@@ -133,7 +133,7 @@
       name: code_builder
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.2.0"
+    version: "4.3.0"
   collection:
     dependency: transitive
     description:
@@ -420,7 +420,7 @@
       name: mockito
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.3.0"
+    version: "5.3.1"
   neat_cache:
     dependency: "direct main"
     description:
diff --git a/auto_submit/pubspec.yaml b/auto_submit/pubspec.yaml
index ff0595c..5964697 100644
--- a/auto_submit/pubspec.yaml
+++ b/auto_submit/pubspec.yaml
@@ -32,7 +32,7 @@
   build_runner: ^2.2.1
   json_serializable: ^6.3.1
   flutter_lints: ^2.0.0
-  mockito: ^5.0.14
+  mockito: ^5.3.1
   test: ^1.21.6
 
 builders: