feat: add updateFlow mutation

packages/backend/src/graphql/root-mutation.ts

@@ -6,6 +6,7 @@ import resetConnection from './mutations/reset-connection';
 import verifyConnection from './mutations/verify-connection';
 import deleteConnection from './mutations/delete-connection';
 import createFlow from './mutations/create-flow';
+import updateFlow from './mutations/update-flow';
 import createStep from './mutations/create-step';
 import executeStep from './mutations/execute-step';
 
@@ -19,6 +20,7 @@ const rootMutation = new GraphQLObjectType({
     verifyConnection,
     deleteConnection,
     createFlow,
+    updateFlow,
     createStep,
     executeStep
   }