Bump json_annotation from 4.6.0 to 4.7.0 in /auto_submit (#2155)

diff --git a/auto_submit/pubspec.yaml b/auto_submit/pubspec.yaml
index 7bd3e77..c93b46d 100644
--- a/auto_submit/pubspec.yaml
+++ b/auto_submit/pubspec.yaml
@@ -19,7 +19,7 @@
   graphql: ^5.1.1
   gql: ^0.13.1
   http: ^0.13.5
-  json_annotation: ^4.6.0
+  json_annotation: ^4.7.0
   meta: ^1.8.0
   neat_cache: ^2.0.2
   shelf: ^1.3.2