feat: make flow name updatable

packages/web/src/graphql/mutations/update-flow.ts

@@ -0,0 +1,10 @@
+import { gql } from '@apollo/client';
+
+export const UPDATE_FLOW = gql`
+  mutation UpdateFlow($id: String!, $name: String!) {
+    updateFlow(id: $id, name: $name) {
+      id
+      name
+    }
+  }
+`;