orval: Wrong code gets generated with array of formData fields

What are the steps to reproduce this issue?

1. Generate code with a swagger.json that has a formData field of an array type

                "parameters": [
                    {
                        "type": "array",
                        "items": {
                            "type": "string"
                        },
                        "description": "Image to upload",
                        "name": "image",
                        "in": "formData",
                        "required": true
                    }
                ]

What happens?

The following code gets generated

export const meAvatarUpload = <TData = WebMediaUploadResponse[]>(
    meAvatarUploadBody: MeAvatarUploadBody,
 options?: SecondParameter<typeof customInstance>) => {const formData = new FormData();
formData.append('image', JSON.stringify(meAvatarUploadBody.image)
//                                         ^ this is wrong, both because of the JSON.stringify() approach and because of the missing closing paren.
      return customInstance<TData>(
      {url: `/me/media`, method: 'post',
       data: formData
    },
      // eslint-disable-next-line
// @ts-ignore
 options);
    }

What were you expecting to happen?

The following code to be generated instead

export const meAvatarUpload = <TData = WebMediaUploadResponse[]>(
    meAvatarUploadBody: MeAvatarUploadBody,
 options?: SecondParameter<typeof customInstance>) => {const formData = new FormData();
  meAvatarUploadBody.image.forEach(image => formData.append('image', image))
 // Manually editing the code makes it work
      return customInstance<TData>(
      {url: `/me/media`, method: 'post',
       data: formData
    },
      // eslint-disable-next-line
// @ts-ignore
 options);
    }

What versions are you using?

Operating System: macOS 11.5 Package Version: 5.5.2 Browser Version: 92.0.4515.107