Updating the title of an existing page does not work

[askalski85]

Why

In readme it is described that https://github.com/iamjackg/md2cf/blob/master/README.md#updating-an-existing-page

To update a page using its ID, use the --page-id option. This allows you to modify the page's title 

Small investigation

According to the code got the update call:
https://github.com/iamjackg/md2cf/blob/master/md2cf/api.py#L195

        update_structure = {
            "version": {
                "number": page.version.number + 1,
                "minorEdit": minor_edit,
            },
            "title": page.title,  # <-- using the passed existing_title is hardcoded
            "type": content_type,
            "body": {"storage": {"value": body, "representation": "storage"}},
        }

And the upsert operation when the page exists:
https://github.com/iamjackg/md2cf/blob/master/md2cf/upsert.py#L100

            existing_page = confluence.update_page(
                page=existing_page, # <-- We are passing existing_page with old title 
                body=page.body,
                parent_id=page.parent_id,
                update_message=page_message,
                labels=page.labels if replace_all_labels else None,
                minor_edit=minor_edit,
            )

Outcome

Page title is never updated. This was my first observation and apparently if I am not wrong this is the implemented behaviour. We should either fix the readme or the code.