fix(fetch): remove unnecessary question mark in fetch query params

[soartec-lab]

Status

READY

Description

I extracted from #1504 what removes the unnecessary question mark in the "fetch" query parameter

Related PRs

#1504

Todos

• Tests
• Documentation
• Changelog Entry (unreleased)

Steps to Test or Reproduce

I test in the next-app-with-fetch sample app.

import { listPets } from './gen/pets/pets';

export default async function Pets() {
  // input blank object
  const { data: pets, status } = await listPets({});

Before

request to http://localhost:3000/pets?

After

request to http://localhost:3000/pets