docs: Fix the URL bugs at tutorial-6-publishing-updating.md (#35175)

* 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

docs/tutorial/tutorial-6-publishing-updating.md

@@ -27,7 +27,7 @@ into your app code.
 ## Using update.electronjs.org
 
 The Electron maintainers provide a free auto-updating service for open-source apps
-at https://update.electronjs.org. Its requirements are:
+at [https://update.electronjs.org](https://update.electronjs.org). Its requirements are:
 
 - Your app runs on macOS or Windows
 - Your app has a public GitHub repository