* Update tutorial-6-publishing-updating.md
The dot at the end of the URL will depend on the site that cannot open. Because it will open `https://update.electronjs.org./` which does not exist.
* docs: fix the URL problems at tutorial-6-publishing-updating.md
The dot at the end of the URL will depend on the site that cannot open. Because it will open `https://update.electronjs.org./` which does not exist.
* docs: fix the URL problems at tutorial-6-publishing-updating.md
* docs: fix the URL problems at tutorial-6-publishing-updating.md
